Jalauddin Rumi

Purity of Heart

"Why hast thou said I have sinned so much, And God of His mercy has not punished my sins?" Thou sayest the very reverse of the truth, O fool! Wandering from the way and lost in the desert! How many times do I smite thee, and thou knowest not? Thou art bound in my chains from head to foot. On thy heart is rust on rust collected, So thou art blind to divine mysteries.
{MasnaviBook 2 Story 15}

Humility

I regard not the outside and the words, I regard the inside and the state of the heart. I look at the heart if it be humble, Though the words may be the reverse of humble. Because the heart is substance and the words accidents.
{MasnaviBook 2 Story 7}