It is not the word of a poet, little is that you believe!Nor is it the word of soothsayer, little is that you remember!So in one instance Allah applies the term messenger to the angelic Messenger and in another instance He applies it to the human Messenger (Muhammad). This is because both of them are conveying from Allah that which has been entrusted to them of Allah's revelation and Speech.Thus, Allah says,تَنزِيلٌ مِّن رَّبِّ الْعَالَمِينَ