Logical analysis of the facts demonstrates not only the existence of advanced humanities and life on other planets, but their presence on our planet. There are thousands of documented cases of unexplained ships, hundreds of cases of governments hiding what they know, and decades of an attempt to encourage the populace to discard the facts as fantasy or foolishness.
Humanity has yet to grapse the reality of extraterrestrials, ufos, alien life, and much more, but you can get started: study these books and articles.
"We should not mistake the Truth with opinions. Many think that the Truth is this or that, or that the Truth is within this or that book, or within this or that belief or idea, etc. Whosoever wants to experience the Truth should not mistake beliefs, ideas, opinions and theories with that which is the Truth. We must experience the Truth in a direct, practical and real manner; this is only possible in the stillness and silence of the mind, and this is achieved by means of meditation."