If you think . . . .
you are a reasonably likeable person, with an adequate level of skills and talents.
you have attracted some great people into your life because you are a good friend and enjoyable company.
you are logical and mature about life's problems, and have a good sense of what's worth a fight and what isn't.
you have reached a level of self-comfort and self-confidence in your place in the world
Then go ahead and raise some teenagers, because they'll let you know in no uncertain terms that you are completely wrong.