Suspicion amongst thoughts are like bats amongst birds, they never fly by twilight.

Brutes by their natural instinct have produced many discoveries, whereas men by discussion and the conclusions of reason have given birth to few or none.

Young people are fitter to invent than to judge; fitter for execution than for counsel; and more fit for new projects than for settled business.

Of great wealth there is no real use, except in its distribution, the rest is just conceit.

The mystery lies in the irrationality by which you make appearance - if it is not irrational, you make illustration.

We must see whether the same clock with weights will go faster at the top of a mountain or at the bottom of a mine; it is probable, if the pull of the weights decreases on the mountain and increases in the mine, that the earth has real attraction.

... wife and children are a kind of discipline of humanity.