Can Metta Make you Beautiful?

Yes, the Mettanisamsa Sutta lists eleven benefits of Metta meditation, out of which ten can be experienced in this life. The ninth one is the one related to this question: "His/her countenance is serene"

Also read the Culla-kamma vibhanga sutta

"But here some woman or man is not angry or much given to rage; even when much is said, he is not furious, angry, ill-disposed, resentful, nor does he show ill-temper, hate or surliness. Due to having performed and completed such kammas, on the dissolution of the body, after death, he reappears in a happy destination... If instead he comes to the human state, he is beautiful wherever he is reborn. This is the way that leads to beauty, that is to say, not to be angry or given to much rage; even when much is said, not to be furious, angry, ill-disposed or resentful, or to show ill-temper, hate or surliness.

43. HOW TO OBTAIN WEALTH, BEAUTY, AND SOCIAL POSITION.

Translated from the Anguttara-Nikâya (iv.1971).

On a certain occasion The Blessed One was dwelling at Sâvatthi, in Jetavana monastery in Anâthapindika's Park. Then drew near Mallikâ the queen to where the Blessed One was; and having drawn near and greeted The Blessed One, she sat down respectfully at one side. And seated respectfully at one side, Mallikâ the queen spoke to The Blessed One as follows:

"Reverend Sir, what is the reason, and what is the cause, when a woman is ugly, of a bad figure, and horrible to look at, and indigent, poor, needy, and low in the social scale?

"Reverend Sir, what is the reason, and what is the cause, when a woman is ugly, of a bad figure, and horrible to look at, and rich, wealthy, affluent, and high in the social scale?

"Reverend Sir, what is the reason, and what is the cause,

p. 229 [A.iv.1971 when a woman is beautiful, attractive, pleasing, and possessed of surpassing loveliness, and indigent, poor, needy, and low in the social scale?

"Reverend Sir, what is the reason, and what is the cause, when a woman is beautiful, attractive, pleasing, and possessed of surpassing loveliness, and rich, wealthy, affluent, and high in the social scale?"

"Mallikâ, when a woman has been irascible and violent, and at every little thing said against her has felt spiteful, angry, enraged, and sulky, and manifested anger, hatred, and heart-burning; when she has given no alms to monk or Brahman, of food, drink, building-sites, carriages, garlands, scents, ointments, bedding, dwelling-houses, and lamps, but has been of an envious disposition, and felt envy at the gains, honor, reverence, respect, homage, and worship that came to others, and been furious and envious thereat; then, when she leaves that existence and comes to this one, wherever she may be born, she is ugly, of a bad figure, and horrible to look at, and indigent, poor, needy, and low in the social scale.

"And, again, Mallikâ, when a woman has been irascible and violent, and at every little thing said against her has felt spiteful, angry, enraged, and sulky, and manifested anger, hatred, and heart-burning; but has given alms to monks and Brahmans, of food, drink, building-sites, carriages, garlands, scents, ointments, bedding, dwelling-houses, and lamps, and has not been of an envious disposition, nor felt envy at the gains, honor, reverence, respect, homage, and worship that came to others, nor been furious and envious thereat; then, when she leaves that existence and comes to this one, wherever she may be born, she is ugly, of a bad figure, and horrible to look at, and rich, wealthy, affluent, and high in the social scale.

"And, again, Mallikâ, when a woman has not been irascible or violent, and though much had been said against her, has not felt spiteful, angry, enraged, or sulky, nor manifested anger, hatred, and heart-burning; when she has given no alms to monk or Brahman, of food, drink, building-sites, carriages, garlands, scents, ointments, bedding, dwelling-houses,

p. 230 [A.iv.1974 and lamps, but has been of an envious disposition, and felt envy at the gains, honor, reverence, respect, homage, and worship that came to others, and been furious and envious thereat; then, when she leaves that existence and comes to this one wherever she may be born, she is beautiful, attractive, pleasing, and possessed of surpassing loveliness, and indigent, poor, needy, and low in the social scale.

"And, again, Mallikâ., when a woman has not been irascible or violent, and though much had been said against her, has not felt spiteful, angry, enraged, or sulky, nor manifested anger, hatred, and heart-burning; when she has given alms to monks and Brahmans, of food, drink, building-sites, carriages, garlands, scents, ointments, bedding, dwelling-houses, and lamps, and has not been of an envious disposition, nor felt envy at the gains, honor, reverence, respect, homage, and worship that came to others, nor been furious and envious thereat; then, when she leaves that existence and comes to this one, wherever she may be born, she is beautiful, attractive, pleasing, and possessed of surpassing loveliness, and rich, wealthy, affluent, and high in the social scale.

"This, Mallikâ, is the reason, this is the cause, when a woman is ugly, of a bad figure, and horrible to look at, and indigent, poor, needy, and low in the social scale.

"This, Mallikâ, is the reason, this is the cause, when a woman is ugly, of a bad figure, and horrible to look at, and rich, wealthy, affluent, and high in the social scale.

"This, Mallikâ, is the reason, this is the cause, when a woman is beautiful, attractive, pleasing, and possessed of surpassing loveliness, and indigent, poor, needy, and low in the social scale.

"This, Mallikâ, is the reason, this is the cause, when a woman is beautiful, attractive, pleasing, and possessed of surpassing loveliness, and rich, wealthy, affluent, and high in the social scale."

When he had thus spoken, Mallikâ the queen replied to The Blessed One as follows:

"Since, now, Reverend Sir, in a former existence I was irascible and violent, and at every little thing said against

p. 231 [A.iv.1977 me felt spiteful, angry, enraged, and sulky, and manifested anger, hatred, and heart-burning, therefore am I now ugly, of a bad figure, and horrible to look at. Since, now, Reverend Sir, in a former existence I gave alms to monks and Brahmans, of food, drink, building-sites, carriages, garlands, scents, ointments, bedding, dwelling-houses, and lamps, therefore am I now rich, wealthy, and affluent. Since, now, Reverend Sir, in a former existence I was not of an envious disposition, nor felt envy at the gains, honor, reverence, respect, homage, and worship that came to others, nor was furious and envious thereat, therefore am I now high in the social scale.

"Now, in this royal family, Reverend Sir, there are maidens of the warrior caste, maidens of the Brahman caste, and maidens of the householder caste, and I bear rule over them. From this day forth I will not be irascible nor violent, and, though much be said against me, I will not feel spiteful, angry, enraged, or sulky, nor manifest anger, hatred, and heart-burning; I will give alms to monks and Brahmans, of food, drink, building-sites, carriages, garlands, scents, ointments, bedding, dwelling-houses, and lamps; and I will not be of an envious disposition, nor feel envy at the gains, honor, reverence, respect, homage, and worship that shall come to others, nor be furious and envious thereat.

"O wonderful is it, Reverend Sir! O wonderful is it, Reverend Sir! It is as if, Reverend Sir, one were to set up that which was overturned; or were to disclose that which was hidden; or were to point out the way to a lost traveller; or were to carry a lamp into a dark place that they who had eyes might see forms. Even so has The Blessed One expounded the Doctrine in many different ways. I betake myself to The Blessed One for refuge, to the Doctrine, and to the Congregation of the priests. Let The Blessed One receive me, who have come to him for refuge, and accept me as a disciple from this day forth as long as life shall last."

There's a few other sutras that mention this idea that when one is angry (emanating UGLY energy outwards) one will receive an ugly countenance (reflective UGLY energy back to one's persona).

Metta produces the opposite effect. I know that my pictures tend to be the best when I am mentally doing metta (genuinely, not "trying").

Lastly, the benefits go far beyond improving one's physical countenance.

Metta does make you physicaly beautiful. You don't go from being super ugly, to super gorgeous. But it can improve a lot more than you might think.

Using an analogy, have you ever noticed that when you are in a realy good mood, people are more enthusiastic with you? And have you ever noticed how when you're in a bad mood, the opposite happens? We all react instinctively to other people's moods, because these moods are "written" in the facial expression, even if we're not consciously aware of "reading" these facial expressions. It's just how the human animal reacts through instinct.

Metta cultivates such high spirits of kindness, happiness and love that your facial expression becomes pleasant, loving and happy. The bitterness, anger, frustration, depression, etc, all melt, day by day, with he practice of metta. Through continued practice, that makes you more and more beautiful.

But if you don't believe me, check these photos taken before and after a meditation retreat:

http://www.shambhalamountain.org/dathun-before-and-after-photos/