They say that time changes things, but you actually have to change them yourself.

Preparation, I have often said, is rightly two-thirds of any venture.

To fly as fast as thought, you must begin by knowing that you have already arrived

Such is the state of life, that none are happy but by the anticipation of change: the change itself is nothing; when we have made it, the next wish is to change again.

I may not know everything, but everything is not known yet anyway

I cannot teach anybody anything. I can only make them think.

Discipline is the bridge between goals and accomplishment.