The biologist passes. The frog stays the same.

Never feel remorse for what you have thought about your wife; she has thought much worse things about you.

There are certain moments when we might wish the future were built by men of the past.

The biologist passes. The frog stays the same.

A body of work such as Pasteur's is inconceivable in our time: no man would be given a chance to create a whole science. Nowadays a path is scarcely opened up when the crowd begins to pour in.

We find it easy to believe that praise is sincere: why should anyone lie in telling us the truth?

It may offend us to hear our own thoughts expressed by others: we are not sure enough of their souls.