Anattā is a Pali word that means not-self or non-self. It is an idea in Buddhism that reminds people that everything in the world is always changing. This means nothing is permanent or lasts forever, and that includes ourselves. We may think of ourselves as a certain person, but nothing about us is the same from day to day – we are constantly growing, learning, and changing. Anattā helps us remember to accept these changes and not be attached to things that won't last.