The fact is that Jesus could not stay in the grave. Death could not keep his prey. Think about why this must be true.
First, Jesus led a sinless, perfect life. Death can certainly claim and hold the sinner, for through sin death entered the world, and the wages of sin is death. But it has no hold over one who is sinless and perfect. Death has no claim over the innocent. Jesus might surrender to it temporarily through the will of the Father, but it has no claim on him and cannot keep him.
Second, Jesus is the divine Son of God in whom is life. He possesses life and is the Life (John 1:4, 5:26, 14:6). Life, being a quality of God, must ultimately triumph over death. Mortal man may be held in its grasp, but not the divine One who is Life himself. The Son of God must rise, for death cannot conquer him who lives eternally.
So Jesus could not stay in the grave. He rose because death could not keep him, the sinless Son of God.
