father... But not Father

father....

For though ye have ten thousand instructors in Christ, yet have ye not many fathers: for in Christ Jesus I have begotten you through the gospel. - 1 Corinthians 4:15

But not Father...

Call no man your father upon the earth: for one is your Father, which is in heaven. - Matthew 23:9

In which the first written father figure outside the actual Father is Job...

16 If I have withheld the poor from their desire, or have caused the eyes of the widow to fail;
17 Or have eaten my morsel myself alone, and the fatherless hath not eaten thereof;
19 If I have seen any perish for want of clothing, or any poor without covering;
21 If I have lifted up my hand against the fatherless, when I saw my help in the gate:
32 The stranger did not lodge in the street: but I opened my doors to the traveler.
40 Let thistles grow instead of wheat, and cockle instead of barley. The words of Job are ended. - Job 31

And to play the part of a father is to care for those in need as a good father cares for his own. So here on earth we are supposed to play the part of father, knowing that one is our Father, even God.