To understand why, and for that we are on earth, God prepared a mission to each of the twelve horoscope.
"It was morning when God stopped in front of his Twelve children and every one of them planted the seed of life. One by one, they turned to Him to receive their gift and know their mission."
"For you, Taurus, give the power to make the substance of the seed. His work is great and requires patience, because you need to finish everything that was started or the seeds will be lost in the wind. You will not question or change your mind in the middle of path, or depend on others to do what he asked. To do this, give him the gift of strength. Use it with wisdom. "
And Taurus returned to his seat.
Then God said, "Each of you is perfect, but you don't know it before you carry out your mission." And the children left, each determined to do their job as best as possible, so they could receive their gift.
But God smiled when he said: "You come back to me often asking to be relieved of their duties, and every time I give you your wishes. You will by countless incarnations before reaching the original mission to determine that. I give them a uncountable time to do it, but only when it is done, you could be Me. "