Knowledge is inherent in man; no knowledge comes from outside; it is all inside. We say Newton discovered gravitation. Was it sitting anywhere waiting for him? It was in his own mind; the time came and he found it out. All knowledge that the world has ever received comes from the mind; the infinite library of the universe is in our own mind. The external world is simply the suggestion, the occasion, which sets you to study your own mind.
Swami VivekanandaWhat the world wants today is twenty men and women who can dare to stand in the street yonder and say that they possess nothing but God. Who will go? Why should one fear? If this is true, what else could matter? If it is not true, what do our lives matter?
Swami VivekanandaThere is no limit to the power of the human mind. The more concentrated it is, the more power is brought to bear on one point
Swami VivekanandaStrength, strength is what the Upanishads speak to me from every page. This is the one great thing to remember, it has been the one great lesson I have been taught in my life; strength, it says, strength, O man, be not weak. Are there no human weaknesses? - says man. There are, say the Upanishads, but will more weakness heal them, would you try to wash dirt with dirt? Will sin cure sin, weakness cure weakness? Strength, O man, strength, say the Upanishads, stand up and be strong.
Swami Vivekananda