Upvote:2
I don't know the original source, but if it is based on Scripture (which certainly seems plausible), here are some passages which may relate:
When [the beggar] saw Peter and John about to go into the temple, he began asking to receive alms. ...But Peter said, βI do not possess silver and gold, but what I do have I give to you: In the name of Jesus Christ the Nazareneβwalk!β - Acts 3:3-6
Peter and John had a command from Jesus to give to anyone who asked of them - but they couldn't give the beggar alms because they didn't have any money. (NOTE: Not having it and thinking you can't afford it are two different things.)
And God has appointed in the church, first apostles, second prophets, third teachers, then miracles, ...various kinds of tongues. All are not apostles, are they? All are not prophets, are they? All are not teachers, are they? All are not workers of miracles, are they? ...All do not speak with tongues, do they? - 1 Corinthians 12:28-30
We are only capable of moving in the "Spiritual Gifts" which we have been given.
You brood of vipers, how can you, being evil, speak what is good? For the mouth speaks out of that which fills the heart. The good man brings out of his good treasure what is good; and the evil man brings out of his evil treasure what is evil. - Matthew 12:34-35
We are only capable of verbalizing that which we already have in our heart.
For the mind set on the flesh is death, but the mind set on the Spirit is life and peace, because the mind set on the flesh is hostile toward God; for it does not subject itself to the law of God, for it is not even able to do so - Romans 8:6-7
The mind set on the Spirit has peace. The fruit of walking by the Spirit is peace. The result is making peace through peaceful means. Alternatively, if you set your mind on the flesh, you will experience death instead of peace, and the result will be the opposite of peace. In other words, if you have peace you can impart peace, but if you don't have peace, you can't impart peace.