How do we know Christ can save us?

We know Christ can save us because He fulfilled all the demands of God's holy law and paid the penalty for our sins through His atoning sacrifice. Romans 4:25 explains that He was delivered for our offenses and raised for our justification, confirming that His resurrection is proof of the efficacy of His atonement. Additionally, as our judge, He ensures that we are justified before God, meaning that our sins have been dealt with completely and we stand innocent before Him. This assurance of salvation rests not on our own merit or works but solely on His perfect work on the cross.