Mystics use the term to refer to the manifestation of divine truth in the microcosm of the human heart and the macrocosm of the universe, interrelated in God's creation and constituting a reflection of the majesty of his Tawhid or indivisible oneness.
But when his Lord appeared on the mountain, making it crumble to a heap of dust, and Musa fell unconscious.
To the contrary, the Muta'zila Sunni and the Shia interpret this verse to prove the impossibility of seeing God.
Two concepts are important to Tajalli; one is shams, the sun of truth, and the other is the mirror of the heart.
According to the symbolical language of mysticism, the sun is a password of Truth and the mirror is the key to the universe and the heart.