"Only a life lived for others is a life worth while"
I believe this quote means that when you are living a life for yourselves and buying unnecessary things for yourself, it is not a so luxurious life than that person would think. Living a life for others, however, is the best life you can give because you are giving life to others. Einstein thinks that a vain life is an unnecessary one but a life of truth and honesty is the best life you can live