Is this truthful Mormon teaching about the eternal progression?

Originally, all people existed as intelligences in the timeless past, as eternal as God himself. Then they were born into the spirit world through resurrected parents of flesh and bone. After living for a time in the spirit world, each person was eventually given a body at human birth. Our goal in this life should be to secure our resurrection as a God, in which capacity the resurrected will continue to progress, just as God did.