God is faithful, who has called us into fellowship with his Son, Jesus Christ our Lord

1 Cor 1:9

⁹ God is faithful, who has called you into fellowship with his Son, Jesus Christ our Lord.

Rom 8:30

³⁰ And those he predestined, he also called; those he called, he also justified; those he justified, he also glorified.

Rom 11:29

²⁹ for God’s gifts and his call are irrevocable.

Gal 1:15

¹⁵ But when God, who set me apart from my mother’s womb and called me by his grace, was pleased ¹⁶ to reveal his Son in me so that I might preach him among the Gentiles, my immediate response was not to consult any human being.

Eph 4:1, 4

⁴ There is one body and one Spirit, just as you were called to one hope when you were called; ⁵ one Lord, one faith, one baptism; ⁶ one God and Father of all, who is over all and through all and in all.

We learn the following from the above verses

1)   God is faithful, who has called us into fellowship with his Son, Jesus Christ our Lord.

2)    And those he predestined, he also called; those he called, he also justified; those he justified, he also glorified

3)   God’s gifts and call are irrevocable

4)   Paul called by God’s grace

5)   We were called to one hope, when we were called