Leonardo

“To do the useful thing, to say the courageous thing, to contemplate the beautiful thing: that is enough for one man's life.”
― T.S. Eliot, The Use of Poetry and the Use of Criticism

“Time is free, but it's priceless. You can't own it, but you can use it. You can't keep it, but you can spend it. Once you've lost it you can never get it back.”
― Harvey MacKay

“The most beautiful thing we can experience is the mysterious. It is the source of all true art and science. He to whom the emotion is a stranger, who can no longer pause to wonder and stand wrapped in awe, is as good as dead —his eyes are closed. The insight into the mystery of life, coupled though it be with fear, has also given rise to religion. To know what is impenetrable to us really exists, manifesting itself as the highest wisdom and the most radiant beauty, which our dull faculties can comprehend only in their most primitive forms—this knowledge, this feeling is at the center of true religiousness.”
― Albert Einstein, Living Philosophies

“Nothing in life is to be feared, it is only to be understood. Now is the time to understand more, so that we may fear less.”
― Marie Curie