“But Jesus answered and said, Ye know not what ye ask. Are ye able to drink of the cup that I shall drink of, and to be baptized with the baptism that I am baptized with? They say unto him, We are able. 23And he saith unto them, Ye shall drink indeed of my cup, and be baptized with the baptism that I am baptized with: but to sit on my right hand, and on my left, is not mine to give, but it shall be given to them for whom it is prepared of my Father.” Matthew 20:22-23
Did you notice Jesus did not rebuke the two disciples when they said they were able to drink from His cup and be baptized with His baptism. Jesus did not consider them to be proud. He won’t rebuke you either or consider you proud if you believe you are able to drink of Jesus cup and be baptized with His baptism.