In everyday things the law of sacrifice takes the form of positive duty.
Instruction does not prevent wasted time or mistakes; and mistakes themselves are often the best teachers of all.
A single seed of fact will produce in a season or two a harvest of calumnies; but sensible men will pay no attention to them.
The superstition of science scoffs at the superstition of faith.
We must have the real thing before we can have a science of a thing.
To be happy is not the purpose for which you are placed in this world.