As you know, that means PAY ATTENTION!
So, a few things I've learned so far....
We taught our Primaries that "casting" was like fishing. You "cast" the line or net out into the water. We let them "cast" pennies into a container. We said that when we have worries (pennies)...we don't want to hold onto them. We instead can "cast" them to Jesus (container) because He wants to get rid of them and help us.
Context wise...our Pastor pointed out that this verse is connected to HUMILITY. Verse 6 says, "Humble yourselves, therefore, under the mighty hand of God so that at the proper time he may exalt you," We are trusting that the mighty hand of God is wise and powerful and full of love. All humility is related to submission...and in this sense is an act of faith that He'll treat us well in the process of sanctifying us. PRIDE is a terrible sin. Our anxieties are intertwined with that Pride. He will care for us.
Have you given Him all your discontentment, discouragement, questions and pain?
You can trust Him!!