there is a continuity of mind, as the Yogis call it. The mind is universal. Your mind, my mind, all these little minds, are fragments of that univers… - Swami Vivekananda

26. स पूर्वेषाम् अपि गुरुः कालेनानवच्छेदात् ॥ २६ ॥
sa poorvesham api guruh kalenanavachchhedat
He is the Teacher of even the ancient teachers, being not limited by time. It is true that all knowledge is within ourselves, but this has to be called forth by another knowledge. Although the capacity to know is inside us, it must be called out, and that calling out of knowledge can only be got, a Yogi maintains, through another knowledge. Dead, insentient matter, never calls out knowledge. It is the action of knowledge that brings out knowledge. Knowing beings must be with us to call forth what is in us, so these teachers were always necessary. The world was never without them, and no knowledge can come without them. God is the Teacher of all teachers, because these teachers, however great they may have been—gods or angels—were all bound and limited by time, and God is not limited by time. ...

Although a man has not studied a single system of philosophy, although he does not believe in any God, and never has believed, although he has not prayed even once in his whole life, if the simple power of good actions has brought him to that state where he is ready to give up his life and all else for others, he has arrived at the same point to which the religious man will come through his prayers and the philosopher through his knowledge; and so you may find that the philosopher, the worker, and the devotee, all meet at one point, that one point being self-abnegation.

What right has a man to say he has a soul if he does not feel it, or that there is a God if he does not see Him? If there is a God we must see Him, if there is a soul we must perceive it; otherwise it is better not to believe. It is better to be an outspoken atheist than a hypocrite.