"When attracted by the forces around him, man has the power to shape and direct them; when thwarted by them, he has the capacity to build a much vaster world in the depths of his own inner being, wherein he discovers sources of infinite joy and inspiration. Hard his lot and frail his being, like a rose-leaf, yet no form of reality is so powerful, so inspiring, and so beautiful as the spirit of man! Thus in his inmost being man, as conceived by the Quran, is a creative activity, an ascending spirit who, in his onward march, rises from one state of being to another."
Allama Iqbal (from The Reconstruction of Religious Thought in Islam)