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.
A man who dares to waste one hour of time has not discovered the value of life.
It is not the strongest or the most intelligent who will survive but those who can best manage change.
The love for all living creatures is the most noble attribute of man.
The world will not be inherited by the strongest, it will be inherited by those most able to change.
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.
We are not here concerned with hopes or fears, only with truth as far as our reason permits us to discover it.
I have called this principle, by which each slight variation, if useful, is preserved, by the term of Natural Selection.
Ignorance more frequently begets confidence than does knowledge.
I am not apt to follow blindly the lead of other men.
I was a young man with uninformed ideas. I threw out queries, suggestions, wondering all the time over everything; and to my astonishment the ideas took like wildfire. People made a religion of them.
Intelligence is based on how efficient a species became at doing the things they need to survive.
Nothing exists for itself alone, but only in relation to other forms of life.
The highest possible stage in moral culture is when we recognize that we ought to control our thoughts.
There is no fundamental difference between man and animals in their ability to feel pleasure and pain, happiness, and misery.
A mathematician is a blind man in a dark room looking for a black cat which isn’t there.
Ignorance more frequently begets confidence than does knowledge: it is those who know little, and not those who know much, who so positively assert that this or that problem will never be solved by science.
Man, in his arrogance, thinks himself a great work, worthy of the interposition of a great deity. It is more humble, and I believe true, to consider him as created from animals.