Plurality of Worlds.—Regarding this earth and other creations, the Lord said to Moses:
"And worlds without number have I created; and I also created them for mine own purpose; and by the Son I created them, which is mine Only Begotten.
"And the first man of all men have I called Adam, which is many.
"But only an account of this earth, and the inhabitants thereof, give I unto you. For behold, there are many worlds that have passed away by the word of my power. And there are many that now stand, and innumerable are they unto man; but all things are numbered unto me, for they are mine and I know them."
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"And the Lord God spake unto Moses, saying: The heavens they are many, and they cannot be numbered unto man; but they are numbered unto me, for they are mine.
"And as one earth shall pass away, and the heavens thereof, even so shall another come; and there is no end to my works; neither to my words.
"For behold, this is my work and my glory—to bring to pass the immortality and eternal life of man."—Moses 1:33-39.
Purposes of Earth Life.—God's purpose, primarily, in placing man upon the earth, is to give him a body, a mortal tabernacle, which is rendered immortal through death and the resurrection. The spirit and the body constitute the soul. It is the soul that is redeemed from the grave (D&C 88:15,16). It is the soul that goes on to perfection. Man is here also for experience, that he may advance from stage to stage of growth and development, approximating nearer and nearer to the divine ideal voiced by the Savior: "Be ye therefore perfect, even as your Father which is in heaven is perfect."—Matthew 5:48.
Man on Probation.—There is still another purpose in man's mortal existence, and it is referred to in the Book of Abraham, where the Creator, after announcing to "those who were with him" the proposed making of an earth "whereon these may dwell," says: "And we will prove them herewith, to see if they will do all things whatsoever the Lord their God shall command." Thus we are shown that man while here is on probation, that he may demonstrate his worthiness to inherit the great things held in reserve for the righteous.