It is clearly desirable for an unmarried man to practice celibacy and indeed, it ought to be the standard in any church which is why I specifically mentioned the Roman Catholic Church's prohibition against married men serving in the priesthood.
The Bible makes it abundantly clear that married men can serve in the priesthood or episcopate, as the letter to Timothy explicitly instructs:
3 This is a true saying, if a man desire the office of a bishop, he desireth a good work. 2 A bishop then must be blameless, the husband of one wife, vigilant, sober, of good behaviour, given to hospitality, apt to teach;
1 Timothy 3:1-2
And the greatest irony of all is that the Roman Catholic Church claims to have been founded by an apostle who was a married man not to mention the fact that priests were permitted to marry right up until the Council of Lateran in 1127.