Matthew 19:12
For there are eunuchs [i.e., men who do not have normal sexual activity] who are born that way; then there are eunuchs who were made that way by undergoing a surgical operation; then there are [also] eunuchs who purposely chose to avoid normal sexual activity for the sake of [ministering in] the kingdom of heaven. Whoever can accept such an arrangement [i.e., of not marrying], should do so."
1 Corinthians 7:32-38
But I want you to be free from worry. The man who is not married is concerned about the affairs of the Lord [and] how to please the Lord.
1 Corinthians 9:5
Do we not have the right to take a believing [i.e., a Christian] wife with us [on our preaching tours], just like the rest of the apostles, and the Lord's brothers do [i.e., James, Joseph, Judas and Simon. Mark 6:3], and Cephas [i.e., Peter]?
1 Corinthians 9:15
But I have not availed myself of any of these rights. And I am not writing this so that it would be done in my case, for I would rather die than have anyone make my boast [i.e., of preaching without financial support] an empty one.