Keep your heart with all vigilance, for from it flow the springs of life. Proverbs 4:23
It's a misquoted, misused, and abused little proverb that has given a lot of people a lot of heartache. Here's all it means:
Life happens, it springs forth out of you and me and everyone we know. Life is beautiful and messy and complicated and confusing and joyful. And it can be all those things without all those things being wrong or evil.
So keep your heart, know it, put it daily before the Lord, because you will create beauty with it, you will mess things up with it, and you will complicate life with it. But our hearts are not eternal and these angsts of life are not either.
When you guard your heart, guard its greatest treasure, Jesus alone. And trust that He is doing all the guarding necessary too.