10 For when the disciples thought that the obligations and burdens of marriage, which their Master's discourse had made clear, seemed extremely heavy, they said to Him: "If the case stands so between man and wife, it is better not to marry at all." Jesus Christ replied that His ideal is not understood by everybody but only by those who have received the gift; for some are hindered from marriage because of some defect of nature, others because of the violence and malice of men, while still others freely abstain of their own will, and this "for the kingdom of heaven." And He concludes with these words, "He that can take it, let him take it."
Source: Sacra Virginitas (Vatican.va)