I knew a witty physician who found theology in the biliary duct, and used to affirm that if there was a disease in the liver, the man became a Calvinist, and if that organ was sound, he became a Unitarian.

Education should be as broad as man.

When believers and unbelievers live in the same manner - I distrust the religion.

The poisons are our principal medicines, which kill the disease and save the life.

Do the thing and you will have the power.

It is noticed, that the consideration of the great periods and spaces of astronomy induces a dignity of mind, and an indifferenceto death.

No sensible person ever made an apology.