In Acts 8:37, Why Does Philip Mention “Believe With Your Whole Heart?”

Welcome to Grace in Focus radio. Bob Wilkin and Mike Lii are answering a question regarding Acts 8:37. Does this verse seem to assert that we must believe with our whole heart in order to receive eternal salvation? Is there such a thing as “mostly believing?” Bob and Mike will offer clarity on this phrase, its origin and the word “believe.”