Do any Christian sects believe jesus as Just a Messengr from God ?

God's Spirit is infinite. Just because God is able to exist in the flesh of a man, doesn't detract from His ability to exist everywhere else at the same time. He remembers every molecule, every hair on your head, and every thought that you would ever have before He created you. Even though we cannot possibly imagine the kind of intelligence God has, He has it. Through Jesus, God accomplished many things. One of them was to show us how to live. If praying is important for us to do, He must also do it. If we are to be baptized, He must also do it. By doing this we have an example to follow. He did this fulfill all righteousness. He doesn't ask us to do things which He is incapable of doing Himself.