In experimental philosophy, propositions gathered from phenomena by induction should be considered either exactly or very nearly true notwithstanding any contrary hypotheses, until yet other phenomena make such propositions either more exact or liable to exceptions.

There are more sure marks of authenticity in the Bible than in any profane history.

If I had stayed for other people to make my tools and things for me, I had never made anything.

What goes up must come down.

You sometimes speak of gravity as essential and inherent to matter. Pray do not ascribe that notion to me, for the cause of gravity is what I do not pretend to know, and therefore would take more time to consider of it.

I understood. I have understood. I do understand.

The Ignis Fatuus is a vapor shining without heat.