Sin penetrates to the heart, darkens and hardens it until it extinguishes the light of belief. Each sin has a path that leads to unbelief. Unless that sin is swiftly obliterated by seeking God's forgiveness, it grows from a worm into a snake that gnaws at the heart.

Establish with all of your powers a union with your fellows and brothers in religion that is stronger than the union of the worldly!

Practice the brotherhood, love, and cooperation insistently enjoined by hundreds of Qur'anic verses and traditions of the Prophet!

Said Nursi Quotes