Zen lives in the present. The whole teaching is: how to be in the present, how to get out of the past which is no more and how not to get involved in the future which is not yet, and just to be rooted, centered, in that which is.
Truth cannot be given; it is already in you. It can be called forth, it can be provoked. A context can be created, a certain space can be created in which it rises in you and is no more asleep, becomes awakened.
The function of the Master is far more complex than you think. It would have been far easier, simpler, if truth could be conveyed. It cannot be conveyed, hence indirect ways and means have to be devised.
Masters don't teach the truth; there is no way to teach it. It is a transmission beyond scriptures, beyond words. It is a transmission. It is energy provoking energy in you. It is a kind of synchronicity.
The Master liberates you from words, he liberates you from all kinds of imaginative philosophies. He brings you to a state of wordless silence. The failure of religion and philosophy is that they all become substitutes for real experience. Beware of it!
Zen cures you of your abnormality. It makes you again normal, it makes you again ordinary. It does not make you a saint, remember. It does not make you a holy person, remember. It simply makes you an ordinary person -- takes you back to your nature, back to your source.