While it is true that to completely understand "enlightenment" one must experience it, it is on occasion necessary to describe it to the curious. "Nothing ventured, nothing gained". I am not selling anything, merely expressing (in simple terms) my knowledge and personal experience.
I also got my introduction to Buddhism through Alan Watts - the Three Pillars of Zen - which I first read in 1968 when I became a practicing Buddhist. I developed and modified my regimen over the decades to its present form which I practice daily.
On enlightenment, 2 examples of satori from my personal experience:
1)The first experience was sitting doing Zazen (classic Zen meditation, counting breaths). After about 1/2 hour of Zazen, I suddenly had an internal vision. I saw myself from above meditating, then my view rapidly receded through the ceiling and roof into the air above the house. As I continued to rise I saw the land below, then the whole planet spinning in space. The earth receded in the distance and I saw the sun and the other planets. The further out I got, the more rapid the movement. I saw the planets orbiting the sun, then the sun itself faded into the distance becoming just another bright speck in the firmament. Then I saw the galactic arm our solar system is in, then the galaxy itself in the company of other galaxies. As I receded further, the galaxies formed a curtain in the black of space, like a shimmering aurora borealis, a fabric waving in a nonexistent wind.
Then suddenly it all went into reverse and I was flying back to my origin. I was then sitting in my room again right where I started. The memory of that journey is still as clear as if it happened yesterday, I can still see the curtain of galaxies fluttering in the nebulous breeze with no difficulty whatsoever. I perceived how very very small and utterly insignificant I was in comparison to the rest of the universe and it gave me a profound sense of peace and calm that I cannot explain further except to say that it is still with me some 40+ years later.
2) In the early 1980's I had been practicing Taekwon Do for more than 10 years and was informed that it was time to test for my first degree black belt. This involved my performing some very difficult tasks before an audience of several hundred persons, many of very advanced TKD rank. One of these tasks was to run 20 feet, jump 4 feet into the air, and side kick through 7 inches of pine boards held by other martial artists. We each got 3 tries. If we failed the third try, a board was removed and we tried a 4th time. If we succeeded then, we would get the black belt but it could be taken away at any time for the next 6 months by a higher ranking person. If we failed the 4th try, we failed the test and had to wait another 2 years before we could retry.
The first try, I merely bounced off the boards. Same with the second try. I set myself up for the third attempt, closed my eyes and went to an internal place of meditation.
I was standing on a rock on the coast of a vast lake. The forest was behind me and a cool breeze in my face. I took a breath and released it slowly, considering the task before me. I took a second breath and went into the halls of my mind, searching. I released that breath and took the third breath, down in the basement of my consciousness. Before me was a big red switch, like one of those on Frankenstein's laboratory walls. I knew in an instant that it was my
rage and I knew that I needed to use that to make the break, so reached up and threw that big red switch.
I opened my eyes as I released the breath, and all I saw was a red tunnel from my face to the boards, nothing else. There was no sound from the crowd, no-one else in the auditorium, I could not even see the board holders, 4 - 200 pound men. Only the boards.
Then I blacked out - no memory of the next few seconds at all, then or now. I just woke up standing in the middle of a pile of kindling scattered in a circle around me. All 4 holders were on their butts on the floor in a semi - circle before me.
My training partner later told me that when I opened my eyes I went emotionally flat. All expression left my face, I assumed a textbook ready stance, took several rapid steps, leaped into the air, rolled over onto my side while flying towards the boards and performed a perfect side kick into the center of the stack. He said when my foot hit the boards they exploded. He said that they did not appear to just
break, they appeared to literally
explode, with debris flying everywhere, along with the 4 big guys who had been holding the boards.
I realized that I now knew where that big red switch was. I could find it again if needed and I could turn it on....or
off. Since that switch is my anger, my rage, this represents a level of self - control that I had never had before then. I can become the Hulk if I need to....or not lose my temper if I choose. This was a level of self control that was new to me then. I count on it now and use it regularly.
Each of these experiences had a profound emotional component and has changed my life. They made me different than I was before I had them and persist within me to this day. I am clear that this explanation is not the same as having the experience yourself, but you now know a little bit more about satori/enlightenment than you did before. I hope it helps.