The spacing effect is one of the most powerful discoveries in the science of learning. First identified by Hermann Ebbinghaus in 1885 through his pioneering experiments on memory and later expanded upon by psychologists such as C. A. Mace (1932) and Harold Pashler (1994), the spacing effect reveals that information is retained far more effectively when study sessions are distributed over time rather than concentrated in a single burst. When we revisit material periodically, each encounter strengthens neural connections, deepens understanding, and counteracts forgetting, a process often summarised as “spacing strengthens memory.” This principle not only enhances academic and professional learning but also contributes to personal wellbeing, reducing stress and burnout by encouraging steady, balanced progress rather than last-minute cramming. On a broader scale, societies that embrace the spacing effect in education and training cultivate lifelong learners, better decision-makers, and more adaptable citizens, laying the groundwork for collective mental resilience and sustainable intellectual growth. Great teachers regularly revisit key themes and facts to help ensure retention by their students. The ministry of Jesus Christ is an outstanding example in this respect and His highly effective teaching style can be clearly seen from the Gospel accounts.