I cannot conceive curved lines of force without the conditions of a physical existence in that intermediate space.

The important thing is to know how to take all things quietly.

But I must confess I am jealous of the term atom; for though it is very easy to talk of atoms, it is very difficult to form a clear idea of their nature, especially when compounded bodies are under consideration.

The lecturer should give the audience full reason to believe that all his powers have been exerted for their pleasure and instruction.

When the contrary magnetic poles were on the same side, there was an effect produced on the polarized ray, and thus magnetic force and light were proved to have relation to each other.

Speculations? I have none. I am resting on certainties.

Tyndall, ... I must remain plain Michael Faraday to the last; and let me now tell you, that if accepted the honour which the Royal Society desires to confer upon me, I would not answer for the integrity of my intellect for a single year.