Time is the coin of your life. It is the only coin you have, and only you can determine how it will be spent. Be careful lest you let other people spend it for you. Carl Sandburg
Mind your speech a little lest you should mar your fortunes. William Shakespeare
He who fights with monsters might take care lest he thereby become a monster. Is not life a hundred times too short for us to bore ourselves? Friedrich Nietzsche
Control thy passions lest they take vengence on thee. Epictetus
Whatever we have of this world in our hands, our care must be to keep it out of our hearts, lest it come between us and Christ. Matthew Henry
