In theory, there is no difference between theory and practice. But in practice, there is. (Yogi Berra)

Whenever I climb I am followed by a dog called ‘Ego’. (Friedrich Nietzsche)

If you want to make an apple pie from scratch, you must first create the universe. (Carl Sagan)

You can only find truth with logic if you have already found truth without it. (Gilbert Keith Chesterton)

I think ‘Hail to the Chief’ has a nice ring to it. (John F. Kennedywhen asked what is his favorite song)