053 Heaven and Hell (3) Inter-Testamental Shift

The Old Testament was vague at best concerning the afterlife and what happens to the self. The Inter-Testamental period represents a significant shift thereon. Why? What changed? What was going on among the ancient Jews to cause such an enormous paradigm shift? Did Jesus believe more like an OT Jew or an inter-testamental Jew? Even more pressing, was God still at work during this "silent" period? Or, is God only at work when it concerns us and our era?