At age 15, Christen was diagnosed with terminal, non-hodgkins lymphoma, but an encounter with a healing God cleared the cancer overnight. This encounter drew Christen out of a theoretical and intellectual belief and into an encounter based faith.
Christen lives by ministry, he has oraganised and hosted national leadership and prayer events and has provided services into a number or well known Christian organisations. More recently Christen has produced materials and services under the title "Jesus Centred" as part of a vision to promote and foster a greater understanding in the Church generally of the way in which all of Scripture illustrates and reveals Jesus. He is currently writting a series of 24 books under this title.