Moreover...

Moreover, testimony with the heart causes salvation from the wrath of Hell in the hereafter, and success to the highest level of Paradise. Thus, this sacred word is the manifestation of mercy of both the beneficence [ al-rahmaniyyah ] and the mercifulness [ al-rahimiyyah ]. It is reported from al-Sadiq (as): Verily, Allah, Blessed and Exalted be He, has taken an oath by His Dignity and Glory that He will never punish the people who believe in His Unity with Hell-fire.