“We must learn to live with contradictions, because they lead to deeper and more effective understanding.”

Speech at the Nobel Banquet (10 December 1979) http://www.nobelprize.org/nobel_prizes/physics/laureates/1979/salam-speech.html.
Context: In the Holy Book of Islam, Allah says:

"Thou seest not, in the creation of the All-merciful any imperfection, Return thy gaze, seest thou any fissure. Then Return thy gaze, again and again. Thy gaze, Comes back to thee dazzled, aweary."

This in effect is, the faith of all physicists; the deeper we seek, the more is our wonder excited, the more is the dazzlement for our gaze.

Ch 2
The Decisive Treatise

Haiku Handbook Mcagraw Hill Books 1985 ISBN 0070287864

Variant translation: The more we learn about the world, and the deeper our learning, the more conscious, clear, and well-defined will be our knowledge of what we do not know, our knowledge of our ignorance. The main source of our ignorance lies in the fact that our knowledge can only be finite, while our ignorance must necessarily be infinite.
Conjectures and Refutations: The Growth of Scientific Knowledge (1963)
Context: The more we learn about the world, and the deeper our learning, the more conscious, specific, and articulate will be our knowledge of what we do not know, our knowledge of our ignorance. For this, indeed, is the main source of our ignorance — the fact that our knowledge can be only finite, while our ignorance must necessarily be infinite.

Source: Snuff

"Rectify the Party's Style of Work" (1942)

Source: The Bed of Procrustes: Philosophical and Practical Aphorisms (2010), p. 107

Song lyrics, The Sensual World (1989)
Context: I turn to my computer like a friend.
I need deeper understanding.
Give me deeper understanding…