Life is not owed us anything, it is not necessary always hard with a straight face. Grateful response to life, at least, it gives us life, gave us survive.
A smile is an attitude to life, with wealth, status, position does not necessarily linked. A rich man might spend all day worried, but a poor man may feel comfortable: a handicapped person may be calm and optimistic; a situation might well frown on people, a people living in adversity, may bring a smile ...
A person's emotional environment, it is quite normal, but you suffer with a straight face, on the situation will not be any change. On the contrary, if with a smile to life, that would increase the affinity of other people more willing to exchange with you , the opportunities will be more.
Only the heart of sunshine, feel the reality of the sun. Life is always a mirror shine is our image, when we cry, the cry of life, when we smile, life is also smiling.
Smile from the heart, neither overbearing nor servile, neither the weak fool, nor a strong flattery. Flatter when the smile is a smirk, while the mask is not long, if given the chance, they would removed the mask, revealing the original features.
Smile no purpose, either for the boss, or on guard, that same smile, a smile is respect for others, is also the respect for life. A smile is the "return", said physics relationships as the balance of forces.
Misinterpreted by the others in, you can select the rage, you can also choose a smile, often smiling strength will be greater, because the smile will shake each other's hearts, exposed open-minded tolerance for each other feel small, ugly.
Einstein's theory has undergone the test of time, and those who let a smile defeated.
Smiling is a self-cultivation, and is a very important accomplishment, the real smile is warm, encouraging, is warm. People who really know how to smile, always easy to get more opportunities than others, always easy to be successful.