“He who has begun has half done. Dare to be wise; begin!”
“Dimidium facti qui coepit habet: sapere aude" ("He who has begun is half done: dare to know!").”
“He dared to do what men and women don't even dare to think. And look what he's done already: he's torn open the sky, he's opened the way to another world. Who else has ever done that? Who else could think of it?”
“The man who has begun to live more seriously within begins to live more simply without”
“He is a wise man who does not grieve for the things which he has not, but rejoices for those which he has.”
“A person who has not done one half his day's work by ten o'clock, runs a chance of leaving the other half undone.”