This sermon presents a clear, biblically grounded framework for knowing one's salvation through the transformative marks of a genuine faith in Christ. Centered on 1 John 2:3–6, it emphasizes that assurance is not based on emotional experience or intellectual assent alone, but on a living relationship with Christ marked by personal fellowship, obedience to His commandments, and the indwelling of the Holy Spirit. The preacher unpacks key indicators—being part of God's family, actively receiving and valuing Scripture, desiring holiness, recognizing Christ's atoning work on the cross, and walking in obedience as Jesus did—each rooted in the believer's ongoing relationship with God. These marks are not legalistic requirements but natural outcomes of a heart transformed by grace, where love for God and others becomes the visible evidence of being in Christ. The tone is both pastoral and convicting, affirming the believer's security while calling for continual growth in faith and holiness.