Romans 1:5c

Through him and for his name's sake, we received grace and apostleship to call people from among all the Gentiles to the obedience that comes from faith.

(v5, NIV)

through whom we have received grace and apostleship to bring about the obedience of faith for the sake of his name among all the nations,

(v5, ESV)

This is a receiving of grace and apostleship that Paul is taking about. This is to call people to the obedience of faith. Paul's ministry is to the Gentiles, and he mentions the Gentiles as those whom are called. God's calling is not strictly limited to a select race or gender.

Why is it about grace? This receiving of grace, the calling and bringing about the obedience of faith is through him. It is also for his name's sake. The name of Christ should be exalted in your life.

If it were by works, we would get the glory. If I do whatever I do by my own strength, I get the glory. If I get the glory, I will perish with it. However, if it is by the power God supplies, then God will get the glory.

If anyone speaks, he should do it as one speaking the very words of God. If anyone serves, he should do it with the strength God provides, so that in all things God may be praised through Jesus Christ. To him be the glory and the power for ever and ever. Amen.

(1 Peter 4:11, NIV)