This quote means that a person’s life is only as strong as the weakest part of their life. It is impossible to have a good life if there is one part of it that is weak or not working properly. For example, if a person puts all their energy into their job but ignores their health, then their life will be weak because their health is suffering. This quote emphasizes that it is important to take care of all aspects of life if a person wants to have a fulfilling life.