Here is a vivid mystical experience recounted by R.H. Ward, and quoted by Robert Crookall in his book The Interpretation of Cosmic and Mystical Experiences.
Last night, as I was walking home, I had one of those strange experiences of ‘rising up within oneself’, of ‘coming inwardly alive’… A minute after I had left the station I was attacked, though not severely, by indigestion… I thought to myself, though I suppose not in so many words, ‘I could separate myself from this pain; it belongs to my body… There is no need for the self to feel it.’ Even as I thought this, the pain disappeared … and the sensation of ‘rising up within’ began. (I have the impression that movement encouraged this sensation)… First there is the indescribable sensation in the spine, as of something mounting up… This was accompanied by an extraordinary feeling of bodily-lightness, of well-being, and effortlessness, as if one’s limbs had no weight and one’s flesh had been suddenly transmuted into some rarer substance. But it was also, somehow, a feeling of living more in the upper part of one’s body than in the lower, a certain peculiar awareness of one’s head… Everything was becoming ‘more’, everything was going up on to another level… I found that I could think-and-feel-in a new way… This, I realized, was the real meaning of ‘being at peace with the world’… But if I allowed any suggestion of dislike, distrust, fear or contempt to approach, it had to be deliberately put away, or the ‘rising up’ began to be a ‘falling down’. But once these kinds of thoughts-and-feelings had been put away, then the ‘rising up’ was continued…
I found myself looking at a certain house… It is rather an ugly little suburban villa; but now it appeared to be another house. I realised that could one always live on the different psychological level on which I was living at this moment, then the whole world would be changed; it would be another world in which there could be nothing which we habitually call ugly or evil, and nothing which we habitually call beautiful or good either; since the truth of things is beyond these contradictions, and somehow takes them up into itself… Time had very little significance… My knowledge of this reality which lies beyond where we normally are was undeniable and irrefutable. It flashed upon me… Of course there is God… God was here; He was in everything that I had looked at and in me who looked… I was in God’s presence… I stood, filled to the brim with this wonderful realisation, that whatever we may have to endure of pain, sickness, grief and man’s inhumanity to man, there is still something perfect within all created things, that ultimately they live by it, and that nothing else matters… [The Interpretation of Cosmic and Mystical Experiences by Robert Crookall, pages 34-36]
This quotation is taken from Ward’s book A Drug-taker’s Notes (1957). I haven’t read this book, but as this excerpt makes apparent, Ward experimented with LSD (evidently on six occasions). Because of this, I at first speculated that the above experience was brought about by LSD he had earlier ingested, perhaps as a sort of psychedelic flashback.
It turns out, however, that the experience recounted above was not Ward’s own, but instead was told to him by someone else, and this other person was not an LSD user. (See this Google books result; footnote on p. 49.) Ward himself used this account as evidence that LSD experiences do not create the same transcendent feelings of union with God that mystical experiences can produce.