It is narrated from Sayyiduna Abu Dharr (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: Successful is the person who creates sincerity in his heart for faith, keeps his heart correct and sound, his tongue truthful, his soul steadfast (in righteous deeds), his way upright, his ear attentive, and his eye observant. The situation is such that the ear is a means (for the heart’s knowledge) and the eye preserves what the heart has memorized, and indeed, successful is the person who makes his heart one that remembers (Allah).