I am going to give you a scientific psychological tool to switch off that internal war that speeds up ageing. It is not magic: it is a biological antidote that transforms your internal dialogue and your values into the most powerful pharmacy you possess. Nobel prize-winning research on telomeres, the protections of each cell, showed that the greatest wear on your DNA comes from a single source: your mind. Your body does not distinguish between a real danger —an accident or an attack— and an imagined or repeated threat. That is why persistent worry or resentment maintained over years is a constant threat to your biology. How does your body respond? By activating, without you noticing, its ancestral defence system: chronic inflammation.