How do we know that Jesus was without sin?

According to Hebrews 4:15, Jesus was uniquely qualified to be our High Priest because He was tempted in every way yet remained without sin. His sinlessness is essential to His role as our Savior; if He had sinned, He would not be a suitable sacrifice for our redemption. This truth is also reinforced through various passages in Scripture that affirm His divine nature, such as 1 Peter 2:22, which states that He committed no sin, and in Him was no deceit. Therefore, His life exemplifies complete obedience to God, making Him the perfect Lamb of God who takes away the sins of the world.