Stoicism is the wisdom of madness and cynicism the madness of wisdom.
The civilized man has a moral obligation to be skeptical, to demand the credentials of all statements that claim to be facts.
Freedom of speech and freedom of action are meaningless without freedom to think. And there is no freedom of thought without doubt.
There is wisdom in the selection of wisdom.
The mere abhorrence of vice is not a virtue at all.
Many studies have established the fact that there is a high correlation between vocabulary and intelligence and that the ability to increase one's vocabulary throughout life is a sure reflection of intellectual progress.