How do we know that God saves sinners like Zacchaeus?

The certainty that God saves sinners, including those like Zacchaeus, is rooted in the biblical accounts and the principles of sovereign grace. In Luke 19, Jesus acknowledged Zacchaeus and declared that salvation had come to his house, illustrating that it is God who initiates salvation. This aligns with the broader teaching found in Romans 3 that no one seeks after God by their own accord; instead, God draws individuals to Himself according to His perfect will. The transformation seen in Zacchaeus, turning from a life of greed to generosity, is testament to the change wrought by God’s grace in the hearts of the elect, instilling faith and repentance.