Here is one of the best quotes I have in my little bag of things to pull out when I need a little inspiration. The author is Anne Lamott.
It's funny: I always imagined when I was a kid that adults had some kind of inner toolbox, full of shiny tools: the Saw of Discernment, the Hammer of Wisdom, the Sandpaper of Patience. But then when I grew up I found out that life hands you these rusty old bent-up tools--friendships, prayer, conscience, honesty--and says "these are all you get; you will have to do the best you can with them."
And mostly, against all odds, they're enough.