The main message Jesus taught on his timeline traveling and preaching was

Answer:Jesus teaches his disciples that "the Son of Man must suffer many things and be rejected by the elders, chief priests, and teachers of the law, as well as that he must be killed and after three days again, he shall rise.

I know this for two reasons, I am a christian, and I always read this in my action bible

The main message that Jesus taught while teaching was, to love your neighbor as yourself and to follow the 10 commandments!