There remains therefore a Sabbath rest for the people of God. For the one who has entered His rest has himself also rested from his works, as God did from His. Let us therefore be diligent to enter that rest, lest anyone fall through following the same example of disobedience. – Hebrews 4:9-11
Unrest is for the disobedient, the guilty. Rest is for the Believer. God calls us to enter His rest, which means that we are at peace in every situation. No matter what is going on, we are at rest because we know that our Father God is handling all the storms in our lives. And God tells us to labor to enter that rest because it is labor. Worries are always going to plague your mind, so you are going to struggle to at rest 24/7. God knows that. That’s why He asked you only to make the effort. And it will become easier as time goes by.