There was a door to which I found no key: There was the veil through which I might not see.

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

The value of three things is justly appreciated by all classes of men: youth, by the old; health, by the diseased; and wealth, by the needy.

Fools, your reward is neither here nor there.

By the help of God and with His precious assistance, I say that Algebra is a scientific art. The objects with which it deals are absolute numbers and measurable quantities which, though themselves unknown, are related to "things" which are known, whereby the determination of the unknown quantities is possible.

Thy Return is as another Sun to Heaven; a new Rose blooming in the Garden of the Soul.

To-day is thine to spend, but not to-morrow; Counting on morrows breedeth bankrupt sorrow: O squander not this breath that Heaven hath lent thee; Make not too sure another breath to borrow.