Passage
One Lord, one faith, one baptism,
One Lord, one faith, one baptism,
Ephesians 4:3 Endeavouring to keep the unity of the Spirit in the bond of peace.
Ephesians 4:4 There is one body, and one Spirit, even as ye are called in one hope of your calling;
Ephesians 4:5 One Lord, one faith, one baptism,
Ephesians 4:6 One God and Father of all, who is above all, and through all, and in you all.
Ephesians 4:7 But unto every one of us is given grace according to the measure of the gift of Christ.
The verse centers on "faith", "lord", and "baptism". It is saying that salvation is received as God's gift through faith, so boasting is pushed out by the wording itself.
The nearby context moves from verse 4's "There is one body and one Spirit..." into verse 6's "One God and Father of all who...", so "faith" and "lord" belong inside that flow. In Ephesians context, the local focus is grace, union with Christ, the church, and new creation.
A plain takeaway is to answer the verse's own emphasis on "faith" and "lord" with trust shaped by these words, not by a vague optimism outside the passage.