Self-knowledge leads to wonder, and wonder to curiosity and investigation, so that nothing interests people more than people, even if only one's own person.
There are two specific objections to use of psychedelic drugs. First, use of these drugs may be dangerous. However, every worthwhile exploration is dangerous—climbing mountains, testing aircraft, rocketing into outer space, or collecting botanical specimens in jungles. But if you value knowledge & the actual delight of exploration more than mere duration of uneventful life, you are willing to take the risks.
The Godhead is never an object of its own knowledge. Just as a knife doesn't cut itself, fire doesn't burn itself, light doesn't illuminate itself. It's always an endless mystery to itself.
Just as true humor is laughter at oneself, true humanity is knowledge of oneself.
To the philosophers of India, however, Relativity is no new discovery, just as the concept of light years is no matter for astonishment to people used to thinking of time ins of kalpas, (A kalpa is about 4,320,000 years). The fact that the wise men of India have not been concerned with technological applications of this knowledge arises from the circumstance that technology is but one of innumerable ways of applying it.