True assurance of salvation is not based on a past decision or religious activity alone, but on present devotion, sound doctrine, and Spirit-led transformation. When faith is genuine, it's evident in love for Christ, hatred of sin, humble obedience, and an ongoing pattern of repentance. The difference between genuine faith and false assurance lies in a heart truly captured by the gospel, finding confidence not in self or superficial forms, but in Christ's finished work and transforming power.