Imam ‘Ali (a.s.) said:
اَلتَّوْحِيْدُ أَنْ لاتَتَوَهْمَهُ و الْعَدْلُ أَنْ لا تَتَّهِمَهُ
Reality of unity of God indicates that one shall not define His essence according to one’s imaginations, and belief in His justice infers that one shall not accuse Him in any work.1
The principle of God’s existence is clear and manifest for us and any particle from particles of this world points to His dignity, power, knowledge and ability. On the other hand, the reality of His essence is hidden from us because He is an infinite existence and beyond our understanding. So we should consider His essence to be beyond whatsoever we may imagine and this is the reality of unity.
Events occur in the world whose underlying mystery is not always known to us. Belief in God’s justice says to us that all of these events are backed by sound reasons and any suspicion in this regard is not in conformity with belief in His justice and wisdom.