1 Korintus 15:9-10

15:9 For I am the least of the apostles, unworthy to be called an apostle, because I persecuted the church of God. 15:10 But by the grace of God I am what I am, and his grace to me has not been in vain. In fact, I worked harder than all of them – yet not I, but the grace of God with me.

Efesus 3:8

3:8 To me – less than the least of all the saints ¹  – this grace was given, ²  to proclaim to the Gentiles the unfathomable riches of Christ

[3:8]  ¹ sn In Pauline writings saints means any true believer. Thus for Paul to view himself as less than the least of all the saints is to view himself as the most unworthy object of Christ’s redemption.

[3:8]  ² sn The parallel phrases to proclaim and to enlighten which follow indicate why God’s grace was manifested to Paul. Grace was not something just to be received, but to be shared with others (cf. Acts 13:47).