For we which have believed do enter into rest, as he said, As I have sworn in my wrath, if they shall enter into my rest: although the works were finished from the foundation of the world.
Hebrews 4:3 (KJV)
We know we are truly believing God’s promises in a certain area of life when we have a sense of peace independent of circumstances and conditions. In Jesus we have access to the works that have been finished from the foundation of the world, which means everything we need is available in Him. The more we meditate on this, the more we will find rest in it.