in the biblical world, this was not just a term relating to the family.
the oldest male in the society was responsible for, respected by and had absolute control over the rest of the group. so it was used by the Old Testament to attribute him to a number of roles
use of father in the Old Testament to attributes god to many roles:
creating the universe
rescuing Israel when in trouble
setting standards of behaviour, e.g. in giving the Ten Commandments
exercising justice, rewarding obedience and punishing misdemeanors
new testament references of god as father include ideas of both protective love and power
Jesus often referred to god as father
in the parable of the forgiving father, god's unconditional love is depicted
Jesus tells his disciples that their Heavenly Father will give good things to those who ask him and teaches them a prayer that addresses god as 'ourFather'
Jesus' relationship with god is seen in his prayer in gethsemane, where he uses abba, the intimate Aramaic term for father
Paul claims that when they pray 'abba, father', christians become adopted children of god
the apostles creed refers to god as father in two senses: as creator of the universe and as the father of Jesus
the apostles creed
in its current form, is a fourth century statement of christian belief