But Jesus said to them, “You do not know what you ask. Are you able to drink the cup that I drink, and be baptized with the baptism that I am baptized with?” (Mk 10:38, cf. v39-40; Lk 12:50)
The baptism that Jesus was referring to here is not water baptism, but the baptism of trials and suffering. When I was young and an unbeliever, I used to wonder, “Why are good kids bullied in school? If the problem is not with them, why are they ostracized for being good?” It took me a while to realize that such kids—coming from good, loving, and often privileged homes, who are meek, good-tempered, and usually bright—are frequently the target of bullies because of jealousy. This is often inexplicable, but the human psyche is not easy to understand. Is it better then for them to renounce their good nature or privilege just to avoid the bullying? Of course not.