Keep your face to the sunshine and you cannot see a shadow - Helen Keller
The first principle is that you must not fool yourself and you are the easiest person to fool.
Richard Phillips Feynman was an American theoretical physicist, known for his work in the path integral formulation of quantum mechanics, the theory of quantum electrodynamics as well as in particle physics
The greatest danger for most of us is not that our aim is too high and we miss it, but that it is too low and we reach it.
Michelangelo di Lodovico Buonarroti Simoni, known best as simply Michelangelo, was an Italian sculptor, painter, architect and poet of the High Renaissance born in the Republic of Florence.