How curious. That he should ridicule the passage of millions or billions of years “to bring conditions to pass by which his sons and daughters might obtain bodies made in his image” - because it seems to me it must have taken
trillions of years to get to that point in a Mormon cosmology!
First God takes an “intelligence” (nondescript individuated substance never adequately described), puts that “intelligence” into a spirit body. According to the founding and subsequent prophets of the Church those spirit bodies are created by a Father and Mother in the same way physical bodies are created on earth. There will therefore be union, conception, gestation, birth, and then of course a growing period. Only after these spirit children have learned enough can they be trusted to be born in bodies on earth (where they will have forgotten everything they needed to learn before being born

).
Whether God has one, two, or a hundred wives to help him, it seems that an incredible amount of time must pass for the creation (conception, gestation, labor, birth) of these spirit sons and daughters, and their period of learning. There are over seven billion people living on earth today. Physical children are born nine months after conception. That would be 63 billion months divided by however many wives God used for this process of putting intelligence into spirit bodies. Maybe gestation is shorter in heaven. Nine days instead of nine months. That would help because then God’s wives could give birth 40 times a year instead of just once. Add to that the number of people who lived before today, plus any numbers on other planets that God has placed people on.
Ans that’s only
two thirds of his spirit children. Remember, according to Mormon teaching,
one-third of the spirit children of God followed Satan. This process of bringing forth spirit sons and daughters, and then teaching them over the course of their first 21 years or so of growth and education (times 1,000 since one day in Heaven is a thousand days on earth?) surely took billions, if not
trillions, of years, Joseph Fielding Smith’s foolish and ridiculous notion notwithstanding.
That seems quiet alien to original, historical, tradition, and current Christianity.