A sure sign of a good book is that you like it more the older you get.
Some people feel with their heads and think with their hearts.
The American who first discovered Columbus made a bad discovery.
A man has virtues enough if he deserves pardon for his faults on account of them.
There is no greater impediment to progress in the sciences than the desire to see it take place too quickly.
Just as the performance of the vilest and most wicked deeds requires spirit and talent, so even the greatest demand a certain insensitivity which under other circumstances we would call stupidity.