Salvation by Grace Through Faith

For the salvation of lost and sinful humanity, regeneration by the Holy Spirit is absolutely essential. Salvation is by grace alone, through faith alone, in Christ alone — never by works. Those who repent and believe are justified, adopted into God's family, and given eternal life.

for by grace you have been saved through faith, and that not of yourselves; it is the gift of God, not of works, that no one would boast.
— Ephesians 2:8-9 (WEB)

Note

The five "alones" of the Reformation summarize this: by Scripture alone, by grace alone, through faith alone, in Christ alone, for God's glory alone.

Bible references

Ephesians 2:8-10 · Romans 3:21-26 · Titus 3:5-7 · John 3:3-7 · Acts 4:12 · Romans 10:9-10