I think there is more to this statement, The opposite is also true. If you do not consider yourself, You have nothing to give anyone else. The middle line is to do your best for yourself, And accept what you are capable of, And show compassion for others who are capable of less, And to not compare yourself too much to people who are capable of more. Most roles in life are artificial to categorize people in easily understandable roles that people can comprehend without much thought or understanding. Looking outside yourself for validation usually comes from not understanding your own role or capabilities and this is where self obsession is toxic. Knowledge of self is the most valuable thing.