I walk slowly, but I never walk backward.

I walk slowly, but I never walk backward.

Progress has not followed a straight ascending line, but a spiral
with rhythms of progress and retrogression, of evolution read more

Progress has not followed a straight ascending line, but a spiral
with rhythms of progress and retrogression, of evolution and
dissolution.

There is no advancement to him who stands trembling because he cannot see the end from the beginning.

There is no advancement to him who stands trembling because he cannot see the end from the beginning.

Progress is the process whereby the human race is getting rid of whiskers, the veriform appendix and God.

Progress is the process whereby the human race is getting rid of whiskers, the veriform appendix and God.

The reasonable man adapts himself to the world, but the unreasonable man tries to adapt the world to him--therefore, all read more

The reasonable man adapts himself to the world, but the unreasonable man tries to adapt the world to him--therefore, all progress depends upon the unreasonable man.

Doubt can only be removed by action.

Doubt can only be removed by action.

Not to go back is somewhat to advance, and men must walk, at least, before they dance.

Not to go back is somewhat to advance, and men must walk, at least, before they dance.

I have found some of the best reasons I ever had for remaining at the bottom simply by looking at read more

I have found some of the best reasons I ever had for remaining at the bottom simply by looking at the men at the top.

All progress is precarious, and the solution of one problem brings us face to face with another problem.

All progress is precarious, and the solution of one problem brings us face to face with another problem.