And who is more unjust than he who is reminded of the Messages of his Lord but he turns away from them and forgets what he has forwarded with his own hands (to be stored). In fact We have placed veils upon their hearts which prevent them from understanding it (- the Qur'ân) and in their ears is (created) heaviness (so that they have turned deaf). You call them to the right path as you may they will never follow the right course and accept guidance.