Buddha called himself 'The Enlightened One' and Jesus called himself 'The Son of God'. To me the term 'World-Teacher' is of as little importance as 'The Son of God' or 'The Enlightened One'.
Islam was something like a Christian heresy. The early heresies had been full of mad reversals and evasions of the Incarnation, rescuing their Jesus from the reality of his body even at the expense of the sincerity of his soul.
In Jesus Christ on the Cross, there is refuge; there is safety; there is shelter; and all the power of sin upon our track cannot reach us when we have taken shelter under the Cross that atones for our sins.
You hate Jesus because someone from the North Country said He was the Son of God. But you hate one another because each of you deems himself too great to be the brother of the next man.
Arabia was idolatrous when, six centuries after Jesus, Muhammad introduced the worship of the God of Abraham, of Ishmael, of Moses, and Jesus. The Ariyans and some other sects had disturbed the tranquility of the east by agitating the question of the nature of the Father, the son, and the Holy Ghost. Muhammad declared that there was none but one God who had no father, no son and that the trinity imported the idea of idolatry.
God never can use any man very much till he has grace enough to forget himself entirely while doing God's work; for He will not give His glory to another nor share with the most valued instrument the praise that belongs to Jesus Christ alone.
This perfection is the restoration of man to the state of holiness from which he fell, by creating him anew in Christ Jesus, and restoring to him that image and likeness of God which he has lost.
Jesus Christ belonged to the true race of the prophets. He saw with an open eye the mystery of the soul. . Alone in all history he estimated the greatness of man.