If we are honest nobody ever wants to feel vulnerable, we all want to feel like we are in control. Unfortunately life puts all of us in positions where we have to live with uncertainty--but instead of feeling vulnerable we have to put our trust in God. God wants to let you know that you can trust Him and enter into His rest.
Proverbs 3:5-6 Trust in the Lord with all your heart, and lean not on your own understanding; in all your ways acknowledge Him, and He shall direct your paths.