Final answer:
In Christianity, Christ is viewed as the guardian and interpreter of Scripture, symbolized in art like the Mandorla and teachings of Maiestas Domini. In Islam, prophets, especially Muhammad, serve as messengers to clarify God's messages.
Step-by-step explanation:
The question "Who is the divinely appointed guardian and interpreter of Scripture?" relates to theological beliefs that vary among different religious traditions. In Christianity, Christ is often regarded as the guardian and ultimate interpreter of Scripture, exemplified by various artistic representations like the Mandorla and the teachings depicted in the iconic form of Maiestas Domini. Similarly, in Islamic context, the "messenger" mentioned could be any of the prophets, with Muhammad being the final messenger, entrusted to clarify and convey the messages of God after an interval between messengers - meant to guide moral life and establish the basis of immortal life. This role is profoundly rooted in the belief systems and often represented in religious art and scripture, to convey these core teachings, especially in times where literacy was not widespread, and symbolism through art served as a primary communication medium.