In the Gospel of Mark, Jesus responds to a request by James and John:
Mark 10:38: "But Jesus said to them, 'You do not know what you are asking. Are you able to drink the cup that I drink, or to be baptized with the baptism with which I am baptized?'”
There seem to be (at least) two elements Jesus is referring to:
1. The "cup" that He will drink might symbolize the beatings/scourging He would experience.
2. The "baptism" in this context appears to be the crucifixion itself (or the totality of events).
Similar language to Christ's impending ordeal appears in the Gospel of Luke:
Luke 12:50: "But I have a baptism to undergo, and how distressed I am until it is accomplished!"
Is this interpretation of Mark 10:38 correct? And, is this verse not essentially conveying the same thing we read in Paul's Letter to the Romans?
Romans 6:3-4: "Or do you not know that as many of us as were baptized into Christ Jesus were baptized into His death? Therefore we were buried with Him through baptism into death, that just as Christ was raised from the dead by the glory of the Father, even so we also should walk in newness of life."