There are some things that can be substituded and replaced.........but there are other things that are VITAL.During this Study we discover from creation, through-out the OT, in the Life of Christ, the Early church and now our lives, there is a VITAL ingredient we cannot afford to live without- The HOLY SPIRIT.To make Him an option or to substitude Him is to effect the nature of the outcome......which is pretty important (I'm sure you will agree)- when that is your LIFE!