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. Every mental and physical blow that is given to the soul, by which, as it were, fire is struck from it, and by which its own power and knowledge are discovered, is Karma, this word being used in its widest sense; thus we are all doing Karma all the time. I am talking to you: that is Karma. You are listening: that is Karma. We breathe: that is Karma. We walk: Karma. Everything we do, physical or mental, is Karma, and it leaves its marks on us.
Swami Vivekananda was an Indian Hindu monk. He was a key figure in the introduction of the Indian philosophies of Vedanta and Yoga to the Western world and is credited with raising interfaith awareness, bringing Hinduism to the status of a major world religion during the late 19th century.