Leonardo da Vinci on truth and lies

Iron rusts from disuse; stagnant water loses its purity and in cold weather becomes frozen; even so does inaction sap the vigor of the mind.

Simplicity is the ultimate sophistication.

Anyone who invokes authors in discussion is not using his intelligence but his memory.

Beauty is truth, truth beauty. That is all ye know on Earth, and all ye need to know.

John Keats1795–1821Ode on a Grecian Urn, Stanza 5. The final lines of this poem have been rendered in various ways in different editions, some placing the entire last two lines within quotation marks, others only the statement “Beauty is truth, truth beauty,” …In context

• Beauty

This above all: to thine own self be true, and it must follow, as the night the day, thou canst not then be false to any man.

William Shakespeare1564–1616Hamlet (1600–1), Act I, scene iii.In context

A lie gets halfway around the world before the truth has a chance to get its pants on.

Winston Churchill1874–1965