How does the Holy Spirit's work assure believers of their salvation?

The assurance of salvation comes from the Holy Spirit's work in the life of a believer. As stated in John 14:26-27, the Holy Spirit not only teaches but also provides peace, reminding believers of their position in Christ. This inner peace and clarity are vital for sustaining faith, especially in times of doubt or pressure. The Spirit's presence signifies that believers are not orphans but are indwelt by God, securing their salvation and fostering a deep relationship with the Father, Son, and Spirit.