Tweet I have been impressed with the urgency of doing. Knowing is not enough, we must apply. Being willing is not enough, we must do. Quote by Leonardo da Vinci. You May Also Like...Today I will do what others won't, so tomorrow I can do what others can't.Yesterday is gone. Tomorrow has not yet come. We have only today. Let us begin.Time stays long enough for anyone who will use it.Happiness is not something ready made. It comes from your own actions.Good actions give strength to ourselves and inspire good actions in others.The noblest pleasure is the joy of understanding.The man who does not read has no advantage over the man who cannot read.Do more than just exist.Either write something worth reading or do something worth writing.