God was once a Man

 

-God the Father is a physical man

God himself, was Once as we are now, and is an exalted man, and sits enthroned in yonder heavens! That is the great secret. If the veil were rent today, and the great God who holds this world in its orbit, and who upholds all worlds and all things by His power, was to make himself visible,—I say, if you were to see him today, you would see him like a man in form like yourselves in all the person, image, and very form as a man;” Joseph Smith, King Follet Discourse, Vol 6, Journal of Discourses

-"God and man are the same race"

"God and man are of the same race, differing only in their degrees of advancement." Apostle Widstoe, Gospel Through the Ages, pg.107

-"You have to learn to be gods yourselves..."

Joseph Smith taught, "You have got to learn how to be Gods yourselves, and to be kings and priests to God, the same as all Gods have done before you."  Joseph Smith, Teachings of the Prophet Joseph Smith, p. 348

- Men must "exalt themselves to be Gods"

"Sons of God who exalt themselves to be Gods, even from before the foundation of the world, and [sic] are the only Gods I have a reverence for." Joseph Smith, Teachings of the Prophet Joseph Smith, p. 375

-God the Father is a resurrected being

“I want you to pay particular attention to what I am saying. Jesus said that the Father wrought precisely in the same way as His Father had done before Him. As the Father had done before? He laid down His life, and took it up the same as His Father had done before. He did as He was sent, to lay down His life and take it up again; and then was committed unto Him the keys. I know it is good reasoning.” Joseph Smith, Teachings of the Prophet Joseph Smith, Section Six 1843-44, p.373

-There are an infinite number of gods

"There is an infinite number of holy personages, drawn from worlds without number, who have passed on to exaltation, and are thus gods." Bruce R. McConkie, Mormon Doctrine, p. 577

-Each god is a polygamist, including God the Father

"Each God through his wife or wives raises up a numerous family of sons and daughters...for each father and mother will be in a condition to multiply forever and forever." Orson Pratt, The Seer 1, 37.

 

God was Never a Man

 

"To whom will ye liken me, and make me equal, and compare me, that we may be alike? Remember the former things of old: for I am God, and there is none else; I am God, and there is none like me." Isaiah 46:5,9  

"God is not a man, that he should lie; neither the son of man, that he should repent: hath he said, and shall he not do it? or hath he spoken, and shall he not make it good? Numbers 23:19

"I will not execute the fierceness of mine anger, I will not return to destroy Ephraim:      for I am God, and not man; the Holy One in the midst of thee: and I will not enter into the city." Hosea 12:9

"Because that, when they knew God, they glorified him not as God, neither were thankful; but became vain in their imaginations, and their foolish heart was darkened. Professing themselves to be wise, they became fools,

And changed the glory of the uncorruptible God into an image made like to corruptible man, and to birds, and fourfooted beasts, and creeping things.

Wherefore God also gave them up to uncleanness through the lusts of their own hearts, to dishonour their own bodies between themselves: Who changed the truth of God into a lie, and worshipped and served the creature more than the Creator, who is blessed for ever. Amen." Romans 1:21-25