Human life is full of rituals, from shaking hands to venerating relics. But how do rituals work, how do they convey meaning? In this Science Set Free discussion, Rupert Sheldrake and Mark Vernon discuss how rituals connect us with people who have done them before, using Rupert's concept of morphic resonance. Rituals build up the collective memory and, be they religious or secular, are one means by which we can access an aspect of life that lasts over time. The conversation explores how rituals bring the sense of the past into the present, touch us in embodied as well as imaginative ways, and convert spaces into sacred places. They explore examples from the foundational rituals of social groups to the rituals of psychotherapy which can bring back memories of the past.