“Like fire in a piece of flint, knowledge exists in the mind. Suggestion is the friction which brings it out. So with all our feelings and actions – our tears and our smiles, our joys and our griefs, our weeping and our laughter, our curses and our blessings, our praises and our blames – every one of these we may find, if we calmly study our own selves, to have been brought out from within ourselves by so many blows. The result is what we are. All these blows taken together are called karma – work, action.”
Swami Vivekananda: Karma Yoga. New York, 1895. Complete Works, 1. 28-29.