Dr. Robert McGee puts it this way:
when we first come to God, we are full of deceits that have filled us throughout our lives. Simply accepting Jesus as Lord and Savior does not set us free from these deceptions…..in fact, Jesus tells us that it is the “truth that will set you free”. As we open ourselves to God, He reveals truth to us…..one truth, one step, at a time. And, each of these truths is given to us in order to destroy some of the deceptions that we had formerly believed. But, it’s a slow, lifelong process.