Best passage …

One can fight evil but against stupidity one is helpless. … I have accepted the fact, hard as it may be, that human beings are inclined to behave in ways that would make animals blush. The ironic, the tragic thing is that we often behave in ignoble fashion from what we consider the highest motives. The animal makes no excuse for killing his prey; the human animal, on the other hand, can invoke God’s blessing when massacring his fellow men. He forgets that God is not on his side but at his side.

On Turning Eighty, is a wonderfully fascinating read on the perspective that 80 years gives you.