Summary
This quote suggests that a person's youthfulness is not reflected in their age but rather in their ability to be open-minded and willing to alter their beliefs or perspectives. It implies that mental flexibility and a willingness to embrace new ideas and experiences are what keep a person youthful and adaptable. Regardless of how old someone is biologically, their mindset plays a crucial role in determining their level of vitality and growth. By constantly challenging and changing their perspectives, people can remain perpetually young in their thinking.