Albert Barnes Commentary Matthew 19:11

"But he said unto them, Not all men can receive this saying, but they to whom it is given." — Matthew 19:11 (ASV)

All men cannot receive this saying. The minds of men are not prepared for this. This saying evidently means what the disciples had just said, that it was good for a man not to marry. It might be good in certain circumstances, in times of persecution and trial, or for the sake of laboring in the cause of religion, without the care and burden of a family. It might be good for many to live as some of the apostles did, without marriage, but it was not given to all men (1 Corinthians 7:1, 7, 9).

To be married, or unmarried, might be lawful according to circumstances (1 Corinthians 7:26).