Paul as should all believers in Christ gave credit to Grace for becoming a believer in Jesus and servant 1 Cor 15:10
10 But by the grace of God I am what I am: and his grace which was bestowed upon me was not in vain; but I laboured more abundantly than they all: yet not I, but the grace of God which was with me.
Rom 1:1
Paul, a servant of Jesus Christ, called to be an apostle, separated unto the gospel of God,
Are we servants of the same Jesus Christ ?
Rom 6:18,22
Being then made free from sin, ye became the servants of righteousness.
But now being made free from sin, and become[passive voice] servants to God, ye have your fruit unto holiness, and the end everlasting life.
1 Pet 2:16
As free, and not using your liberty for a cloke of maliciousness, but as the servants of God.
Rev 7:3
Saying, Hurt not the earth, neither the sea, nor the trees, till we have sealed the servants of our God in their foreheads.
Then its by the Grace of God !