How do we know that God's work is effective in people's lives?

The effectiveness of God's work in people's lives can be discerned through the fruits they produce, as taught in Matthew 7:16 where Jesus states, 'Ye shall know them by their fruits.' If the Lord has truly planted someone in His house, they will exhibit good fruit — acts of faith, love, and righteousness. Moreover, Psalm 92:13 reinforces this by indicating that those planted in the house of the Lord shall flourish and bear fruit even in old age. Thus, the spiritual fruits in a believer's life serve as tangible evidence of the Lord's active work of planting and nurturing.