If you desire purification of the heart then shut your eye from the corporeal world. This is the hole through which heart is defiled. - Shaqiq al-Balkhi

There are three things which a man in bound to practice. Whosoever neglects any one of them must need neglect them all, and whosoever cleaves to any one of them much needs cleave to them all. Strive therefore, to understand, and consider heedfully.

God hath made the pious living in their death and hath made the wicked dead during their lives, i.e., the pious, though they be dead, yet live, since the angels utter blessings on their piety until they are made immortal by the recompense which they receive at the Resurrection.

Worship of God which is done for ostentation is submerged in the earth. And that which is done for God's sake ascends to celestial spheres.