Who is Maurice from Valis and what is their importance?

Horselover Fat's last therapist, Maurice (no surname or professional title given) helps him cope with divorce from Beth. Maurice is a product of the 1960s, a member of SNCC and CORE and is a former Israeli commando. He is large, black-bearded, and punctuates his admonitions with declarations that "And I really mean it" (pg. 82). His plan is to bully Fat into enjoying life instead of saving people. He warns that because when Sherri Solving dies of cancer, Fat will also die, he should kill himself now, unless he has better plans, and offers to teach him easier ways to go. If he wants to help people, Maurice says, Fat should give money to professional care-givers rather than trying, amateurishly, to help himself.