Swami Rama Tirtha very early 1900's

“Sit still, chant Om’ and then think Who is within you. All the Vedanta, nay all the philosophy of the Hindus is simply an exposition of this syllable Om.’ Om’ has a charm about it, an efficiency, a virtue in it which directly brings all feelings and all thoughts into a state of harmony, brings peace and rest to the soul and puts the mind in a state where it is one with God. Science may not be able to explain this, but this is a fact which can be verified by experiment. Woe unto science if it goes against the truth connected with the efficiency of the sacred syllable Om.’ The real Self which is knowledge absolute and power absolute is the only stern Reality, before which the apparent reality of the world melts away! Om’ is the name of this Reality.