If water stands motionless in ...

If water stands motionless in a pool it grows stale and muddy, but when it moves and flows it becomes clear: so, too, man in his wanderings.
 Muhammad Asad

Quotes from the same author

Islam appears to me like a perfect work of architecture. All its parts are harmoniously conceived to complement and support each other; nothing is superfluous and nothing lacking; and the result is a structure of absolute balance and solid composure.
 Muhammad Asad
If the Muslims keep their heads cool and accept progress as a means and not an end in itself, they may pass on to Western man the lost secret of life's sweetness.
 Muhammad Asad
...the Muslims of recent times had fallen very short indeed of the ideals of their faith, ...nothing could be more erroneous than to measure the potentialities of Muhammad's message by the yardstick of present-day Muslim life and thought - just as he [Shaykh Mustafa al-Maraghi] said, 'it would be erroneous to see in the Christians' unloving behavior toward one another a refutation of Christ's message of love...'
 Muhammad Asad
...I suddenly felt in myself all the weight of Europe: the weight of deliberate purpose in all our actions. I thought to myself, 'How difficult it is for us to attain to reality... We always try to grab it: but it does not like to be grabbed. Only where it overwhelms man does it surrender itself to him.
 Muhammad Asad