How do we know that Jesus Christ was sinless?

The assertion of Christ's sinlessness is rooted in His nature as the Son of God. Unlike all other humans who inherit a sinful nature from Adam, Jesus was born of the Virgin Mary and thus did not partake in Adam's sin. His unique conception means He lived a life free from sin, as stated in 1 Peter 2:22, which affirms that 'He committed no sin, and no deceit was found in His mouth.' His ability to fulfill the law perfectly is foundational to His role as our Savior, fulfilling the righteousness required for our redemption.