A man who dares to waste one hour of life has not discovered the value of life.
Charles Darwin - Life - Time - Value

It is not the strongest of the species that survive, nor the most intelligent, but the one most responsive to change.
Charles Darwin - Knowledge - Change - Strength - Survival - Evolution - Intelligent

I feel most deeply that this whole question of creation is too profound for human intellect. A dog might as well speculate on the mind of (Isaac) Newton! Let each man hope and believe what he can.
Charles Darwin - Knowledge - Animal - Belief - Questions - Intelligent

It has often and confidently been asserted, that man's origin can never be known: Ignorance more frequently begets confidence than does knowledge: it is those who know little, not those who know much, who so positively assert that this or that problem will never be solved by science.
Charles Darwin - Knowledge - Confidence - Ignorance - Science - Problems - Solutions

I love fools’ experiments. I am always making them.
Charles Darwin - Fool - Research

As for a future life, every man must judge for himself between conflicting vague probabilities.
Charles Darwin - Evolution - Life - Judgment

I can indeed hardly see how anyone ought to wish Christianity to be true; for if so the plain language of the text seems to show that the men who do not believe, and this would include my Father, Brother, and almost all my best friends, will be everlastingly punished. And this is a damnable doctrine.
Charles Darwin - Truth - Christianity - Belief - Family - Punishment - Control

With savages, the weak in body or mind are soon eliminated; and those that survive commonly exhibit a vigorous state of health. We civilized men, on the other hand, do our utmost to check the process of elimination; we build asylums for the imbecile, the maimed, and the sick; we institute poor-laws; and our medical men exert their utmost skill to save the life of every one to the last moment. There is reason to believe that vaccination has preserved thousands, who from a weak constitution would formerly have succumbed to smallpox. Thus the weak members of civilized societies propagate their kind. No one who has attended to the breeding of domestic animals will doubt that this must be highly injurious to the race of man. It is surprising how soon a want of care, or care wrongly directed, leads to the degeneration of a domestic race; but excepting in the case of man himself, hardly any one is so ignorant as to allow his worst animals to breed.
Charles Darwin - Competition - Survival - Evolution - Weakness - Health - Poverty - Doctors - Society - Animal - Life - Ignorance

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.
Charles Darwin - Struggle - Change - Strength - Winning - Competition - Success - Survival - Evolution