The biggest prison in the world has no bars, no guards and billions of inmates. It's the human mind. In this powerful TEDx talk, Jackie Brennan tells the unforgettable story of Mahine, a rare white tiger who never left the corner of her cage, even after it was gone. That metaphor becomes personal as Jackie shares her lifelong fear of heights and how one bridge, one belief, and one moment transformed everything. With warmth, wit, and wisdom, Jackie breaks down the invisible autopilot programmes that hold us back and shows how small brain hacks, like visualisation, posture, and even singing, can rewire your thinking. Her message is simple and profound: the door to your cage has always been open. So what if the only thing standing between you and your best life is a belief that was never true? “Crossing that bridge wasn’t just about fear — it was about finally letting go of the crap that held me back.” – Jackie Brennan Jackie Brennan believes the greatest power we possess is the ability to change our own lives—once we truly understand how the mind works. Having experienced burnout firsthand, she developed a deep fascination with the science of human behaviour and what drives us.Today, Jackie helps individuals and organisations break free from outdated, autopilot subconscious patterns and tap into the hidden potential that’s been there all along. For her, understanding the mind isn’t just an advantage, it’s the ultimate game-changer. This talk was given at a TEDx event using the TED conference format but independently organized by a local community. Learn more at https://www.ted.com/tedx