I don't think I ever really believed in what Catholics call "grace of state" until I became a mom. If you're Catholic then you know what I'm talking about. We use the term "grace of state" when we mean that God provides the graces necessary to deal with whatever we need to deal with in our particular state in life. Of course, in order to cash in on this special grace we have to been in tune with the Church's modes of providing grace (i.e. the Sacraments). But for some reason I could never really see this grace at work in my life until Joseph's birth.
That parents with young children survive day after day, month after month on very little sleep or being woken up multiple times per night must be a proof for God's providential grace of state. There is no way I could have done it as a university student. Not to say that I don't still complain when I'm woken up several times a night, but I'm almost positive that in my pre-motherhood days I actually would have snapped completely.
In addition, this special grace is so particular -- not just "grace for mothers," "grace for fathers," etc -- that we are provided with grace to have patience with our particular child or our particular spouse. Often I think, there's no way I could be married to so and so or be a mother to that child, I wonder how his wife/her parent does it. But that's just the point. Grace of state is particular to my own state in life.
It's an encouraging thought that when Christ told St Paul "my grace is sufficient" He really meant it. That means that we each have enough grace for our state in life -- as a mother/father, wife/husband, student/teacher -- at this moment. It means that I don't have to be worried that I can't handle 4 young children at one time or that I'm scared of having teenage children. I don't have 4 children. I don't have any teenagers. If and when I ever do, God will provide the grace necessary. And that is an encouraging thought.