8. He saith unto them, Moses--as a civil lawgiver.
because of--or "having respect to."
the hardness of your hearts--looking to your low moral state, and your inability to endure the strictness of the original law.
suffered you to put away your wives--tolerated a relaxation of the strictness of the marriage bond--not as approving of it, but to prevent still greater evils.
But from the beginning it was not so--This is repeated, in order to impress upon His audience the temporary and purely civil character of this Mosaic relaxation.
10. His disciples say unto him, If the case of the man be so with his wife, it is not good to marry--that is, "In this view of marriage, surely it must prove a snare rather than a blessing, and had better be avoided altogether."
11. But he said unto them, All men cannot receive this saying, save they to whom it is given--that is, "That the unmarried state is better, is a saying not for everyone, and indeed only for such as it is divinely intended for." But who are these? they would naturally ask; and this our Lord proceeds to tell them in three particulars.
12. For there are some eunuchs which were so born from their mother's womb--persons constitutionally either incapable of or indisposed to marriage.
and there are some eunuchs which were made eunuchs of men--persons rendered incapable by others.
and there be eunuchs which have made themselves eunuchs for the kingdom of heaven's sake--persons who, to do God's work better, deliberately choose this state. Such was Paul ( 1 Corinthians 7:7 ).
He that is able to receive it, let him receive it--"He who feels this to be his proper vocation, let him embrace it"; which, of course, is as much as to say--"he only." Thus, all are left free in this matter.