In other words, the person mature enough to commit to either the married or religious state of life must already have become a free, self-possessed, unique masculine or feminine celibate — for that is precisely what caelebs means: singular and alone!

St. Faustina’s Encounter With Her Guardian Angel
One day, when I was at adoration, and my spirit seemed to be dying for Him, and I could no longer hold back my tears, I saw a spirit of great beauty who spoke these words to me: "Don't cry - says the Lord." After a moment I asked, "Who are you?" He answered me, "I am...