There are continents and seas in the moral world, to which every man is an isthmus or inlet, yet unexplored by him.

Let us not underrate the value of a fact; it will one day flower into a truth.

Verily, chemistry is not a splitting of hairs when you have got half a dozen raw Irishmen in the laboratory.

Friendship is never established as an understood relation. It is a miracle which requires constant proofs. It is an exercise of the purest imagination and of the rarest faith!

I am resolved that I will not through humility become the devil's attorney. I will endeavor to speak a good word for the truth.

I live in the angle of a leaden wall, into whose composition was poured a little alloy of bell-metal. Often, in the repose of my mid-day, there reaches my ears a confused tintinnabulum from without. It is the noise of my contemporaries.

Nature has left nothing to the mercy of man.