Can truth be found through reason alone?

A friend has asked: Can truth not be found by the support of reason alone?

In the evening a third man came and said: I don’t know whether God is or is not. I am neither theist nor atheist. What should I do? Buddha said: Now drop all worry. Be silent. Drop both theist and atheist talk. Say no more. That much was fine—those were three different men. But Buddha’s attendant, Ananda, heard all three answers. You can imagine his plight—what is the truth? In the morning God is; at noon God is not; in the evening both are to be dropped and one must be silent! At night he tossed and turned. Buddha asked: You are very restless—what is it? He said: You’ve taken my life. What am I to do—is there God or not? I heard three answers from the same man on the same day! I am feverish, my mind is in turmoil. Buddha said: Foolish one, not one answer was given…

Question: WE TRIED REASONING OUR WAY TO HIM: IT DIDN'T WORK; BUT THE MOMENT WE GAVE UP, NO OBSTACLE REMAINED. HE INTRODUCED HIMSELF TO US OUT OF KINDNESS: HOW ELSE COULD WE HAVE KNOWN HIM? REASON TOOK US AS FAR AS THE DOOR; BUT IT WAS HIS PRESENCE THAT LET US IN. BUT HOW WILL YOU EVER KNOW HIM, AS LONG AS YOU ARE UNABLE TO KNOW YOURSELF? ONCE ONE IS ONE, NO MORE, NO LESS: ERROR BEGINS WITH DUALITY; UNITY KNOWS NO ERROR. THE ROAD YOUR SELF MUST JOURNEY ON LIES IN POLISHING THE MIRROR OF YOUR HEART. IT IS NOT BY REBELLION AND DISCORD THAT THE HEART'S MIRROR IS POLISHED FREE OF THE RUST OF HYPOCRISY AND UNBELIEF: YOUR MIRROR IS POLISHED BY YOUR CERTITUDE -- BY THE UNALLOYED PURITY OF YOUR FAITH.

Osho, what is the definition of God?

Words are very small. If you say God is light, then what of darkness? The scriptures have said that God is light. Suppose we accept this as a definition—then what about darkness? Where will darkness go? Darkness is too; in fact it is far more than light. Light sometimes is and sometimes is not; darkness is always, eternal. Where will you place darkness? If you say God is light, darkness is left out. If you say God is darkness, then light is left out. If you say God is both darkness and light, a contradiction arises: they cannot be together. Try to have both darkness and light in the same room. If you bring in light, darkness disappears; if you preserve darkness, you cannot have light. Then how can both be together? That becomes an impossibility. So you cannot say “both” either. Then the fourth device is to say: it…

It is this discussing of truth, this deliberating on truth that creates the chasm between truth and one's self. In that perception that comes when the mind is empty of thoughts neither the soul exists, nor the body, nor God, nor nature -- but there is something that cannot be given a name. For the sake of convenience, let me call it the universal soul. That unknown, nameless, undivided unity is truth. When you try to think about it, it appears in different pieces -- but when you are free from thoughts it manifests in its undivided form. That is its original form; that is its real face. Deliberation breaks it asunder to look at it. Deliberation is an analytical process and the nature of analysis requires that something be dissected, that something be broken into pieces before it can be looked at.

truth cannot be achieved by human efforts because all human efforts are bound to originate in the mind and mind is the barrier between truth and consciousness the mind has to be put aside that's what man is capable of doing not using the mind, putting the mind aside by-passing the mind, transcending the mind and the moment the mind is not functioning consciousness immediately becomes connected with the truth the barrier is no more there hence the bridge happens and that is the greatest blessing in existence when truth showers on you only with the experience of truth life becomes meaningful, significant a celebration a man without truth is a beggar a man without truth is not yet really alive he is simply living in a kind of dream he is not awakened not awakened to the tremendous beauty of existence to the immense ecstasy of life not aware…