Confidence is delight - delight in living, in being who you are, in what you do, in growing, in the endless and sometimes exasperating adventure of what it means to be human. So, too, the mother who delights in being a mother does not worry overmuch about whether she fits the rules. She is not the mother, after all, of something material but of a living child. Rules can often be a guide to successful living, but they are not a substitute for living. Rules never quite keep up with reality, because rules come from experience, not the other way around.
Life happens, and it is infinitely inventive.
When life turns your wisest plans or best rules upside down, throw out the plans and bend with the circumstance. You will find powers you did not suspect, and possibilities undreamed of. Confidence is not always winning, not always victory. Indeed, it is that very quality in humanity which refuses to stay defeated. A kind of stubborn cheerfulness.