Old Khayyám, say you, is a debauchee;If only you were half so good as he!He sins no sins but gentle drunkenness,Great-hearted mirth, and kind adultery.But yours the cold heart, and the murderous tongue,The wintry soul that hates to hear a song,The close-shut fist, the mean and measuring eye,And all the little poisoned ways of wrong.

To friends and eke to foes true kindness show; No kindly heart unkindly deeds will do; Harshness will alienate a bosom friend. And kindness reconcile a deadly foe.

If I don't enjoy myself now, when shall I?

We are thinking about bad only those who are worse than we are, and those who are better than us ... I'm just not up to us ... One does not follow it than smell roses. Another of the bitter herbs will produce honey. Give bread to one - will remember forever. Another life donation - do not understand.

Hearts are like tapers, which at beauteous eyes Kindle a flame of love that never dies; And beauty is a flame, where hearts, like moths, Offer themselves a burning sacrifice.

The Revelations of Devout and Learn'd Who rose before us, and as Prophets burn'd, Are all but Stories, which, awoke from Sleep They told their comrades, and to Sleep return'd.

Algebras (jabbre and maqabeleh) are geometric facts which are proved by propositions five and six of Book two of Elements.