If you help others with sincere motivation and sincere concern, that will bring you more fortune, more friends, more smiles, and more success. If you forget about others' rights and neglect others' welfare, ultimately you will be very lonely.
Material objects give rise to physical happiness, while spiritual development gives rise to mental happiness. Since we experience both physical and mental happiness, we need both material and spiritual development. This is why, for our own good and that of society we need to balance material progress with inner development.