God sovereignly reveals what we are called to be.

We must always remember that God is the One who gives a divine calling. He initiates it (not us).

1 Cor 12:18 But now God has set the members, each one of them, in the body just as He pleased.

1 Cor 12:28 And God has appointed these in the church: first apostles, second prophets, third teachers, after that miracles, then gifts of healings, helps, administrations, varieties of tongues.

7  But to each one of us grace was given according to the measure of Christ's gift.

8  Therefore He says: "When He ascended on high, He led captivity captive, And gave gifts to men."

9  (Now this, "He ascended"--what does it mean but that He also first descended into the lower parts of the earth?

10  He who descended is also the One who ascended far above all the heavens, that He might fill all things.)

11  And He Himself gave some to be apostles, some prophets, some evangelists, and some pastors and teachers,