Matthew 19:11

What then saith Christ? He said not, "yea, it is easier, and so do," lest they should suppose that the thing is a law; but He subjoined, "Not all men receive it, but they to whom it is given," raising the thing, and showing that it is great, and in this way drawing them on, and urging them. But see herein a contradiction. For He indeed saith this is a great thing; but they, that it is easier. For it was meet that both these things should be done, and that it should be at once acknowledged a great thing by Him, that it might render them more forward, and by the things said by themselves it should be shown to be easier, that on this ground too they might the rather choose virginity and continence. And if it is of free choice, one may say, how doth He say, at the beginning, "All men do not receive it, but they to whom it is given?" That thou mightest learn that the conflict is great, not that thou shouldest suspect any compulsory allotments. For it is given to those, even to the willing. But He spake thus to show that much influence from above is needed by him who entereth these lists, whereof He that is willing shall surely partake. For it is customary for Him to use this form of speech when the good work done is great, as when He saith, "To you it is given to know the mysteries." And that this is true, is manifest even from the present instance. For if it be of the gift from above only, and they that live as virgins contribute nothing themselves, for nought did He promise them the kingdom of Heaven, and distinguish them from the other eunuchs.

But let none think, that wherein He adds, save they to whom it is given, that either fate or fortune is implied, as though they were virgins only whom chance has led to such a fortune. For that is given to those who have sought it of God, who have longed for it, who have striven that they might obtain it.

And the Lord said not, It is good, but rather assented that it is not good. However, He considered the weakness of the flesh; But he said unto them, All cannot receive this saying; that is, All are not able to do this. But all cannot obtain it, because all do not desire to obtain it. The prize is before them; he who desires the honour will not consider the toil. None would ever vanquish, if all shunned the struggle. Because then some have fallen from their purpose of continence, we ought not therefore to faint from that virtue; for they that fall in the battle do not slay the rest. That He says therefore, Save they to whom it is given, shows that unless we receive the aid of grace, we have not strength. But this aid of grace is not denied to such as seek it, for the Lord says above, Ask, and ye shall receive.