“And 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.”
King James Version (KJV)
20:23 But to sit on my right hand - Christ applies to the glories of heaven, what his disciples were so stupid as to understand of the glories of earth. But he does not deny that this is his to give. It is his to give in the strictest propriety, both as God, and as the Son of man. He only asserts, that he gives it to none but those for whom it is originally prepared; namely, those who endure to the end in the faith that worketh by love.
Mt 20:23 Ye shall drink indeed of my cup. They cannot do it now, but in due time they shall follow him; they shall rise to their calling, and bravely meet all its risks and hardships. See Ac 12:1,2 Re 1:9. Is not mine to give. The highest honors of his kingdom were not now to be disposed of by him to gratify the worldly ambition of any one. For whom it is prepared. The Father had a plan in reference to the honors of the kingdom. The lowliest would be the loftiest. They who gave up most would get most.