we are always slow in admitting any great change of which we do not see the intermediate steps

If I had my life to live over again, I would have made a rule to read some poetry and listen to some music at least once every week.

I never gave up Christianity until I was forty years of age.

In the struggle for survival, the fittest win out at the expense of their rivals because they succeed in adapting themselves best to their environment.

The love for all living creatures is the most noble attribute of man.

A mathematician is a blind man in a dark room looking for a black cat which isn't there.

I worked on true Baconian principles, and without any theory collected facts.