For Allah, the past, present and future are all the same.  He is not limited by time or space. Since He has created humans, He knows what will happen to them in the future. That is why He has planned for it and shared this good news through the prophets. The prophets all spoke of a wonderful future for humanity in their teachings. Both divine and non-divine books talk about this bright future. They all mentioned a divine prophet who would come at the end of time to fulfill this promise. This prophet, along with his rightful successors, will bring about a stable, sweet, beautiful, and joyful future for humanity. Therefore, those who follow the prophets, especially the last Prophet of Allah, will share in the honor and spiritual rewards of creating this future. It is not just about life right now. The important thing is that anyone who works towards a better future at any time will gain these spiritual rewards. The Prophet of Islam has aimed to create this bright future for everyone.