A civilization is a heritage of beliefs, customs, and knowledge slowly accumulated in the course of centuries, elements difficult at times to justify by logic, but justifying themselves as paths when they lead somewhere, since they open up for man his inner distance.

Knowledge rests not upon truth alone, but upon error also.

Science is organized knowledge. Wisdom is organized life.

The degree of one's emotions varies inversely with one's knowledge of the facts.

Happiness exists on earth, and it is won through prudent exercise of reason, knowledge of the harmony of the universe, and constant practice of generosity.

Illness is the doctor to whom we pay most heed to kindness, to knowledge, we make promise only pain we obey.

The more knowledge you have, the greater will be your fear of Allah.

The small part of ignorance that we arrange and classify we give the name of knowledge.

Ardor, n. The quality that distinguishes love without knowledge.

In friendship as well as love, ignorance very often contributes more to our happiness than knowledge.