TEHRAN, Young Journalists Club (YJC) -
Imam Kazem (pbuh):
I swear to God a believer is not bestowed with the goodness of this world and the Hereafter but because of his/her good opinion about God and hope to Him, his/her being good-tempered, and his/her avoiding backbiting the Faithful.
Source: Bihar ul-Anvar, vol. 6, p. 28