Wasn’t Jesus just a good teacher?
Jesus was certainly a great teacher. But he also said and did things a mere teacher couldn’t: he forgave sins against others, accepted worship, claimed to be one with the Father and said he would judge the world.
Someone who said those things and was wrong would not be a good teacher. C. S. Lewis famously put it that Jesus was either mad, bad or God. The one thing he didn’t leave open was “merely a good man”.
Read one of the Gospels and decide for yourself.
From the Bible
I and the Father are one.”
John 10:30
5Jesus, seeing their faith, said to the paralytic, “Son, your sins are forgiven you.” 6But there were some of the scribes sitting there, and reasoning in their hearts, 7“Why does this man speak blasphemies like that? Who can forgive sins but God alone?” 8Immediately Jesus, perceiving in his spirit that they so reasoned within themselves, said to them, “Why do you reason these things in your hearts? 9Which is easier, to tell the paralytic, ‘Your sins are forgiven;’ or to say, ‘Arise, and take up your bed, and walk?’ 10But that you may know that the Son of Man has authority on earth to forgive sins”—he said to the paralytic— 11“I tell you, arise, take up your mat, and go to your house.” 12He arose, and immediately took up the mat, and went out in front of them all; so that they were all amazed, and glorified God, saying, “We never saw anything like this!”
Mark 2:5–12