Stupidity and wisdom meet in the same centre of sentiment and resolution, in the suffering of human accidents.

Stubborn and ardent clinging to one's opinion is the best proof of stupidity

Stubborn and ardent clinging to one's opinion is the best proof of stupidity.

It is a disaster that wisdom forbids you to be satisfied with yourself and always sends you away dissatisfied and fearful, whereas stubbornness and foolhardiness fill their hosts with joy and assurance.

We can be knowledgable with other men's knowledge but we cannot be wise with other men's wisdom.

The plainest sign of wisdom is a continual cheerfulness: her state is like that of things in the regions above the moon, always clear and serene