According to the Gerontology Research Group, Ethel Caterham, the 115-year-old British woman holds the title of the world's oldest living person's record. She was born even before the World War I on August 21, 1909. However, while much around her has changed, including countries, borders, and technologies, her mantra to a healthy life has not. It is: "Never argue with anyone. I listen and I do what I like." This is the golden rule she follows to lead a healthy life. She was born in a small village in southern England, called Shipton Bellinger and was the second youngest among eight of her siblings. She shares that this was the time when there were horse-drawn carriages and handwritten letters were in trend. She has seen a lot of things, including two World Wars, rise of the internet and many other changes throughout history. However, her mantra is what kept her maintain her calm. When she was 18, she also spent some time in India, where she worked as a nanny. Spending three years there, she returned to England and then moved to Hong Kong and Gibraltar after she married her husband Norman, who was a British army major. She revealed that for her, travel was a stressbuster. There was a newness in it, and embracing different cultures, while staying true to her own, helped her keep calm. Studies have also shown that traveling to new places can improve your mental health. As it was relieve the tension and stress of your work life and also help your mind relax and heal. It also helps as a regular reset, and helps increase your creativity and mental power, as well as focus. The Rule To Never ArgueWhile being in her care home in Surrey, Ethel also spoke about her rule to never argue with anyone. This may sound old fashioned, however, psychologists agree that chronic stress, anger and emotional conflicts can in fact raise stress. The approach to never argue in ways falls under the ambit of "you cannot change things that are not under your control", a true line all therapists swear by. It also helps you avoid unnecessary arguments, and preserve your mental and physical health. Ethel also ensures that she celebrates her life. In the photos, she celebrated her 115th birthday and wore a tiara and enjoyed a cake. The key to her life's secret is positivity and happiness, which she continues to live through her mantra of never arguing. In fact, as per a 2023 study published in BMC Geriatrics, titled Happy people live longer because they are healthy people, notes that higher levels of happiness are associates with longer life expectancy. The study also found that happiness was significantly associated with lower mortality.