When we are saved, it's because you believe the gospel of Christ. The gospel teaches that Christ died for your sins. He is risen from the dead as your living Savior and Lord (1 Corinthians 15:1-4). Believers confess that Jesus Christ is Lord (Romans 10:9). Christ is your surety of salvation (Hebrews 7:22).
When we are saved, God is working in you through Christ (Hebrews 13:20-21). God will "make you complete in every good work to do His will, working in you what is well pleasing in His sight, through Jesus Christ, to whom be glory forever and ever. Amen" (vs. 21). Therefore, to be saved is to please God through Christ. Your relationship with God is in Christ forever (Romans 8:37-39).
When we are saved, God's grace is in you through faith in Christ. Jesus is the fulness of God's grace (John 1:16). God's grace saves you through faith in Christ. Grace in Christ is the gift of God (Ephesians 2:8-9). Grace is God's unmerited favor for sinners. Be saved and sure by God's grace in Christ.
"Believe on the Lord Jesus Christ and you will be saved" (Acts 16:31). The Bible is clear about when you are saved. Base your salvation upon the written word of God in the Bible. When we are saved, the promise of God is our assurance. Be saved and sure, believing on the Lord Jesus Christ.