There are two kinds of disease of the soul, vice and ignorance.

Do not go through life like leaf blown from here to there believing whatever you are told.

Whenever, therefore, people are deceived and form opinions wide of the truth, it is clear that the error has slid into their minds through the medium of certain resemblances to that truth.

Go wherever the facts lead.

When you propose ridiculous things to believe, too many men will choose to believe nothing at all.

Follow the argument wherever it leads.

How can you call a man free when his pleasures rule over him.