A tool is but the extension of a man's hand, and a machine is but a complex tool. And he that invents a machine augments the power of a man and the well-being of mankind.

You are not called to be a canary in a cage. You are called to be an eagle, and to fly sun to sun, over continents.

Gratitude is the fairest blossom which springs from the soul.

Why is not a rat as good as a rabbit? Why should men eat shrimps and neglect cockroaches?

We are but a point, a single comma, and God is the literature of eternity.

Men of dissolute lives have little incentive to look forward to the hopes and glories of immortality. A due conception of these would be incompatible with such a life.

Refinement that carries us away from our fellow-men is not God's refinement.