NIV1984 Ephesians 1:13
And you also were included in Christ when you heard the word of truth, the gospel of your salvation. Having believed, you were marked in him with a seal, the promised Holy Spirit,
If the gospel of our salvation teaches FAITH ALONE to be saved then we should take away the "LIFE part of the LIFE, death, burial, resurrection of our Lord Jesus which He WALKED/LIVED on this earth for us to WALK/LIVE as He did for being part of His body where we have been included to prepare us for WORKS OF SERVICE.
NIV1984 Ephesians 4:11-16
It was he who gave some to be apostles, some to be prophets, some to be evangelists, and some to be pastors and teachers, to prepare God’s people for works of service, so that the body of Christ may be built up until we all reach unity in the faith and in the knowledge of the Son of God and become mature, attaining to the whole measure of the fullness of Christ. Then we will no longer be infants, tossed back and forth by the waves, and blown here and there by every wind of teaching and by the cunning and craftiness of men in their deceitful scheming. Instead, speaking the truth in love, we will in all things grow up into him who is the Head, that is, Christ. From him the whole body, joined and held together by every supporting ligament, grows and builds itself up in love, as each part does its work.
NIV1984 Ephesians 5:23
For the husband is the head of the wife as Christ is the head of the church, his body, of which he is the Savior.