It is presented right to your face, and at this moment the whole thing is handed over to you. For an intelligent fellow, one word should suffice to convince him of the truth of it, but even then error has crept in. Much more so when it is committed to paper and ink, or given up to wordy demonstration or to logical quibble, then it slips farther away from you. The great truth of Zen is possessed by everybody. Look into your own being and seek it not through others. Your own mind is above all forms; it is free and quiet and sufficient. In its light all is absorbed. Hush the dualism of subject and object, forget both, transcend the intellect, sever yourself from the understanding.
The basic idea of Zen is to come in touch with the inner workings of our being, and to do this in the most direct way possible, without resorting to anything external. Therefore, anything that has the semblance of an external authority is rejected by Zen. Absolute faith is placed in a man’s own inner being. For whatever authority there is in Zen, all comes from within. This is true in the strictest sense of the word.
Zen professes itself to be the spirit of Buddhism, but in fact it is the spirit of all religions and philosophies. When Zen is thoroughly understood, absolute peace of mind is attained, and a man lives as he ought to live. What more may we hope?
For Zen reveals itself in the most uninteresting and uneventful life of a plain man of the street, recognizing the fact of living in the midst of life as it is lived. Zen systematically trains the mind to see this; it opens a man’s eye to the greatest mystery as it is daily and hourly performed; it enlarges the heart to embrace eternity of time and infinity of space in its every palpitation; it makes us live in the world as if walking in the garden of Eden; and all these spiritual feats are accomplished without resorting to any doctrines but by simply asserting in the most direct way the truth that lies in our inner being.
Daisetz Teitaro Suzuki – An Introduction to Zen Buddhism