The Guarantee of Our Inheritance – The Seal of the Holy Spirit in the Believer's Life
Pastor Tan Thai · Aug 12, 2018
This sermon explains the meaning of the Holy Spirit as seal and guarantee in the believer's life, based on Ephesians 1:13-14. The Holy Spirit is not only the mark confirming salvation but also the certain assurance of the heavenly inheritance God promises to those who believe in Jesus Christ. The sermon also identifies practical signs of the Spirit's seal through the spiritual fruit and daily life of the believer.
The sermon opens by presenting the list of spiritual blessings God grants to those who believe in Jesus Christ according to Ephesians 1:3-14, including being chosen for sanctification, adopted as children, redeemed, forgiven, given grace, and made heirs of an inheritance. The central focus is Ephesians 1:13-14, where the Apostle Paul declares that the Holy Spirit is the seal of salvation and the guarantee — or down payment — of the eternal inheritance God promises to believers.
The pastor uses C.S. Lewis's illustration of the difference between 'looking at' and 'looking along' to explain how believers recognize the presence of the Holy Spirit. Just as only two people in love can truly understand the feeling of love, believers recognize the Holy Spirit not through external scientific analysis but through lived inner experience — through life transformation, understanding of Scripture, the experience of prayer, and the knowledge of God. C.S. Lewis summarized: 'I believe in Christianity as I believe that the sun has risen: not only because I see it, but because by it I see everything else.'
The sermon then analyzes the phenomenon of brand worship in modern society — from cars, clothing, and coffee to universities — and applies it to the religious sphere, where people often identify their faith with a denomination or a pastor's name. The pastor recalls the error of the Corinthian church, where members claimed to belong to Paul, Apollos, or Cephas rather than recognizing that the true seal is the Holy Spirit dwelling within, as stated in 2 Corinthians 1:21-22.
The final section focuses on the practical signs of the Spirit's seal in the believer's life. The pastor emphasizes that this seal is not an outward badge or wedding ring but an inward transformation, recognized through the fruit of the Spirit in Galatians 5:19-22: love, joy, peace, patience, kindness, goodness, faithfulness, gentleness, and self-control. The sermon closes with a solemn warning from Matthew 7:22-23, that not everyone who says 'Lord, Lord' or performs miracles truly belongs to Him, but only those who do the will of the Father in heaven will enter the kingdom.