1 Peter 5:7 casting all your care upon Him, for He cares for you.
Depending on God can seem like a daunting thing when you first look at life because we are brought up in a very material world.
We do depend on food, water and even light to survive and we trust that we are able to work hard enough to supply for and cover those needs.
What Peter is writing here is that we give up the anxiety we face for the supply of such needs to God. God provides daily needs for all other creatures who blindly trust in the unseen.
God wants us to show faith by having a form of that blind and absolute trust in Him.