Failing to continually renew the basic foundational principles may lead to spiritual amnesia. Memories fade with the passage of time unless they are periodically reinforced. Long term memory requires continual activation and reinforcement, including repeatedly rehearsing basic biblical truths and doctrines in order to commit them to the long term memory. Peter insisted that after we come to know the truth, we must then later become established within it, and finally be perpetually reminded. Passover is one of those established truths that must be continually reinforced into our long-term memory.