How do we know that salvation is conditioned on Christ alone?

The Bible consistently declares that salvation is conditioned solely on the person and work of Jesus Christ. Hebrews elaborates on this by calling Jesus the heir of all things, establishing Him as the center of God’s redemptive plan. This theological truth is also echoed in Ephesians 1:3, which states that believers are blessed with all spiritual blessings in Christ. Unlike other traditions that promote a cooperative effort for salvation, Reformed theology asserts that it is Christ who fulfills all conditions necessary for the salvation of His people, secured through His life and death, thereby ensuring that it rests entirely on His righteousness and work.