'Howbeit that is not first which is spiritual, but that which is natural; then that which is spiritual.'
But there is an order to things. First comes what is of nature (natural, soulish), where life is imparted to the flesh by God, and then that which is spiritual, with full spiritual life being received from Him Who is Spirit and Who is the life-giver. The one was always to precede the other. Had Adam not sinned he would have progressed from soulish man to spiritual man. But when he sinned the seed died within him. Thus another, a second representative Man, had to come, who could provide that heavenly life which was lost in Adam.