Assurance of salvation is founded on:
1. The blood & righteousness of Christ revealed in the Gospel;
2. The inward evidence of those graces of the Spirit unto which promises are made;
3. The testimony of the Spirit of adoption, witnessing with our spirits that we are the children of God.
— 2LCF 18.2
In other words, we can be sure of our salvation because of Christ’s work 𝘧𝘰𝘳 us, the Spirit’s work 𝘪𝘯 us, and the Spirit’s testimony 𝘵𝘰 us of the Father’s love.