How do we know that Christ’s work guarantees our spiritual blessings?

In Ephesians 1:3-5, Paul explains that God has blessed us with every spiritual blessing in Christ, affirming that these blessings are given unconditionally to those He has chosen. This union with Christ ensures that as He accomplished redemption, we also receive the fullness of blessings that come through His person and work. Therefore, the certainty of our spiritual blessings is intrinsically linked to the completeness of what Christ has done, infusing our faith with assurance and confidence before God.