We know Christ is our rest because He fulfilled all righteousness and offers us peace in Him.
The assurance that Christ is our rest comes from the gospel itself, which declares that He lived a sinless life, took our sins upon Himself, and declared, 'It is finished' (John 19:30). This completion of His work signifies that all necessary labor for salvation has been accomplished. As believers, when we place our faith in Christ, we enter into His rest, which is characterized by a profound peace and assurance before God, as our obligation has been eternally met through Him.
Scripture References:
John 19:30, Hebrews 4:3, Matthew 11:28
Commentary