As Arkwright and Whitney were the demi-gods of cotton, so prolific Time will yet bring an inventor to every plant. There is not a property in nature but a mind is born to seek and find it.

Nothing can bring you peace but yourself. Nothing can bring you peace but the triumph of principles.

Who shall forbid a wise skepticism, seeing that there is no practical question on which anything more than an approximate solution can be had?

Of all tools, an observatory is the most sublime. . . . What is so good in a college as an observatory? The sublime attaches to the door and to the first stair you ascent, that this is the road to the stars.

Every man's condition is a solution in hieroglyph to those inquiries he would put. He acts it as life before he apprehends it as truth.

The prayer of the farmer kneeling in his field to weed it, the prayer of the rower kneeling with the stroke of his oar, are true prayers heard throughout nature.

Our moods do not believe in each other.