Aristotle, the celebrated Greek philosopher, said that "Quality is not an act, it is a habit".

We have read of some celebrated philosopher who was so absent-minded that he paid a call at his own house.

He did not take up the subject of Russia until the 1730's, the decade that made him the most celebrated philosopher in Europe and the foremost figure of the Enlightenment.

He was the son of Gaetano Filangieri, a celebrated philosopher and jurist.

His daughter Anne married the celebrated philosopher George Berkeley, Bishop of Cloyne.

Among them were Zhu Xi, the most celebrated Chinese philosopher after Confucius, and Xin Qiji, the greatest composer of the ci form of poetry.

The celebrated philosopher returned to Syracuse, though, after some hypocritical cordiality, they began arguing bitterly about Dion's fate.

What words mean and how slippery those meanings can be was a subject to which Ludwig Wittgenstein, one the the century's most celebrated and difficult philosophers, devoted much of his waking life.

His biography of Isaiah Berlin reveals the strong impression the celebrated philosopher made on Ignatieff.

The two men who influenced Bishop the most were Reverend James Finlayson and the celebrated philosopher, Dugald Stewart.