بِالْحَقِّ وَالْهُدَى وَبِالنُّورِ وَالضِّيَاءِ
He was sent with truth, guidance, light, and illumination.
Truth expresses what is right and established; guidance directs to the correct path; and light and illumination describe guidance that removes the darkness of misdirection.
The purpose of the prophetic message is to direct creation toward the way of Allah.