How do we know Jesus is the advocate for sinners?

In 1 John 2:1, we are told that Jesus Christ is our advocate with the Father. This concept provides profound comfort to believers, highlighting that, even when we sin, we have a defending representative who stands before God on our behalf. Unlike human advocates, who may be limited in knowledge and ability, Jesus — being divine — has the fullness of righteousness and authority to intercede effectively. His advocacy ensures that our sins do not prevent us from receiving mercy and forgiveness because His sacrifice has fully satisfied God's justice.