John Tyndall

It is as fatal as it is cowardly to blink facts because they are not to our taste.

Knowledge once gained casts a faint light beyond its own immediate boundaries.

Life is a wave, which in no two consecutive moments of its existence is composed of the same particles.

The brightest flashes in the world of thought are incomplete until they have been proved to have their counterparts in the world of fact.

Superstition may be defined as constructive religion which has grown incongruous with intelligence.

Religious feeling is as much a verity as any other part of human consciousness; and against it, on the subjective side, the waves of science beat in vain.

The mind of man may be compared to a musical instrument with a certain range of notes, beyond which in both directions we have an infinitude of silence.

We have heard much of Faraday's gentleness and sweetness and tenderness. It is all true, but it is very incomplete.

Underneath his [Faraday] sweetness and gentleness was the heat of a volcano. He was a man of excitable and fiery nature; but through high self-discipline he had converted the fire into a central glow and motive power of life, instead of permitting it to waste itself in useless passion.