Each undervalues that part of the materials of thought with which he is not familiar.

Bad men need nothing more to compass their ends, than that good men should look on and do nothing.

The general tendency of things throughout the world is to render mediocrity the ascendant power among mankind.

It appears, then, to be a condition of a genuinely scientific hypothesis, that it be not destined always to remain an hypothesis, but be certain to be either proved or disproved by.. .comparison with observed facts.

To discover to the world something which deeply concerns it, and of which it was previously ignorant; to prove to it that it had been mistaken on some vital point of temporal or spiritual interest, is as important a service as a human being can render to his fellow creatures.

In proportion as the people are accustomed to manage their affairs by their own active intervention, instead of leaving them to the government, their desires will turn to repelling tyranny, rather than to tyrannizing: while in proportion as all ready initiative and direction resides in the government, and individuals habitually feel and act as under its perpetual tutelage, popular institutions develop in them not the desire of freedom, but an unmeasured appetite for place and power.

Photography is a brief complicity between foresight and luck.