The man of science has learned to believe in justification, not by faith, but by verification.

Thomas Henry Huxley

The ultimate court of appeal is observation and experiment… not authority.

Thomas Henry Huxley

The scientific imagination always restrains itself within the limits of probability.

Thomas Henry Huxley

Science is simply common sense at its best, that is, rigidly accurate in observation, and merciless to fallacy in logic.

Thomas Henry Huxley

The rung of a ladder was never meant to rest upon, but only to hold a man's foot long enough to enable him to put the other somewhat higher.

Thomas Henry Huxley