What is the essence of spiritual enlightenment

I think I've found the most simple and truthful description out there. Which is

"Knowing and understanding, without reasoning, how information, obtained directly through the senses, relates to the true nature of the force that gives the time for something to exist and function"

I've come to this sentence by simply looking up words in a dictionary and combining their definitions. To me this is so true. To short cut to how this reduces suffering: Emotion is a sense (almost no one uses it consciously like that where I live). It is a sense that lets you know how you feel. You can sense when you are creating suffering. Then when you sense that you are suffering you can concentrate on that feeling. When you combine that with knowing that you only experience a subjective reality by which meaning is created by you when you observe it, and meaning doesn't exist on its own in an objective reality. You have the tools to find out what meaning you are attaching to something that makes you suffer. When you dive into that you will find that what you are observing, and attaching meaning to, is an illusion. It always comes down to mistake subjective for objective that makes you a victim and makes you suffer. Seeing that you are making the mistake is the antidote for suffering and therefore you can let go of the illusion. So getting closer to reality starts with sensing. So the essence of spirituality is sensing how to stay close to that which works/ is life/ is truth.

Nothing that you observe includes how you need to feel about it. Feeling is only known to you by sensing.

The unraveling of the words "spiritual enlightenment" to the description stated in bold above is shown here in this ~5 min. video: https://www.youtube.com/watch?v=CNQiWyX1IIU

So the question is, what is the essence of spiritual enlightenment?

The essence of Enlightenment, in short, is to be stress free.

This is by understanding the 4 Noble Truths and attaining Nirvana, which is realised through the Noble 8 Fold Path organised into the 3 Fold Training, which essentially is the path out of stress and misery, or the path to Nirvana.

The essence of enlightenment is awakening to the truth and getting rid of delusion.

I once read, I don't recall where, that Buddha stated that spiritual enlightenment is not suffering.

This is wrong. Enlightenment is wisdom. The result of wisdom is no suffering. Therefore, wisdom itself & no suffering are not exactly the same thing (although the former leads to the later).

That he put it in a negation on purpose. Ok, I get that, not suffering.

This is also wrong. The Buddha said the sole purpose of his spiritual path was complete freedom of mind. (MN 29)

With NLP

Wikipedia states:

NLP has since been overwhelmingly discredited scientifically but continues to be marketed by some hypnotherapists and by some companies that organize seminars and workshops on management training for businesses. There is no scientific evidence supporting the claims made by NLP advocates and it has been discredited as a pseudoscience by experts.

I learned there are 2 types of motivation. 1). Moving away from. 2). Moving towards to. The second is more valuable in my experience, because it brings me want I want, instead of something that differs from what I do not want, but isn't necessarily something I would want instead.

The Buddhist path uses 'moving away' ('abandoning'; 'giving up') to achieve the goal. It is the opposite of what you have written.

Enlightened Buddhist have said: "To be happy, the mind must give up the desire to be happy".

So to be able to move towards experiencing spiritual enlightenment I need to know what is.

The result of enlightenment is an absence of greed, hatred & delusion. To move towards experiencing enlightenment requires abandoning these very three mental impurities. By moving away from selfish desiring, the mind moves towards what is desired. As Jesus said: "To save one's life, one must lose one's life".

I would like to known, in simple words, what spiritual enlightenment is.

In Buddhism, most simply, enlightenment is seeing how attachment & self-view is suffering; in such a way that attachment & self-view are given up or dropped by the mind.

So the question is, what is the essence of spiritual enlightenment?

MN 37 most briefly summarises the entire teachings as: "Nothing ought to be attached to (as I, me or mine)". This is the essence of Buddhist enlightenment.