Lamentablemente, esta revelación progresiva es frecuentemente dejada de lado a la hora de realizar estudios bíblicos o en la propia lectura devocional… pero esto puede significar una gran pérdida en el entendimiento del texto bíblico, y en otros momentos una “sobreinformación” ya que se trae un conocimiento posterior y, por tanto, desconocido en esa época, y desde ahí se explica el pasaje escritural. El autor afirma que el concepto de la vida, la muerte y el más allá que se va desplegando en las Escrituras es esencial en cada momento para comprender mucho de lo que allí se expone. «Por tanto –nos sigue diciendo el autor- es absolutamente necesario conocer el progreso de las ideas sobre la otra vida para que sirvan de clave para discernir muchos textos del Antiguo Testamento y, cómo no, del Nuevo. Es más, me atrevo a decir que estamos ante una clave interpretativa que sirve de llave para la compresión de las Escrituras. Como parte de este recorrido se incluirá un período esencial como es el intertestamentario que conecta y alumbra al Nuevo Testamento. Alfonso Pérez Ranchal in his book , frames these terms in the concept of progressive revelation. He frames these terms in the concept of progressive revelation, indicating that God was making known His will and purposes as time progressed. In this progression, the Israelite people went through moments of great historical importance marked by divine actions and messages. At times, all this meant new ways of understanding God; at others, the protagonists or recipients had to make a whole new reflection on history and their own lives in the face of what they now knew of the Creator. Unfortunately, this progressive revelation is often left aside when it comes to biblical studies or in one's own devotional reading... but this can mean a great loss in the understanding of the biblical text, and at other times an "over-information" since a later knowledge is brought in and, therefore, unknown at that time, and from there the scriptural passage is explained. The author affirms that the concept of life, death and the afterlife that unfolds in the Scriptures is essential at each moment to understand much of what is expounded there. Therefore," the author continues, "it is absolutely essential to know the progress of the ideas about the afterlife so that they can serve as a key to discern many texts of the Old Testament and, of course, of the New Testament. Moreover, I dare say that we are before an interpretative key that serves as a key to the understanding of the Scriptures. As part of this journey, we will include an essential period such as the intertestamental period that connects and illuminates the New Testament.