It is one of the more striking generalizations of biochemistry - which surprisingly is hardly ever mentioned in the biochemical textbooks - that the twenty amino acids and the four bases, are, with minor reservations, the same throughout Nature.
Golf is played by twenty million mature American men whose wives think they are out having fun.
In front of us was not a line but a fortress position, twenty miles deep, entrenched and fortified, defended by masses of machine-gun posts and thousands of guns in a wide arc. No chance for cavalry!
I prayed for twenty years but received no answer until I prayed with my legs.
Anyone who stops learning is old, whether at twenty or eighty. Anyone who keeps learning stays young. The greatest thing in life is to keep your mind young.