This is fron the Journal of the American Dental Association from 1927!

"If every individual would recognise the power of thought in its influence on charactor, he would be more careful of his thinking. That there is a definate and direct effect produced on the individual by every thought...there can be no question. The reason we do not achieve our full measure of greatness is because we are hampered by the smallness of our thoughts. Every bad or unworthly thought puts a blight on our development; and the longer we harbor such a thought, the more we are handicapped in our normal growth. We cannot always prevent a bad thought from entering our mind, but we can resolutely put it aside the moment we recognise it. And this is our supreme duty. If we thought better of our fellow-man, if we compelled our minds to dwell on all their good qualities and overlooked their bad qualities, we would thereby grow in grace ourselves and we would cultivate grace in others. Right thinking is a tonic not only to the mind but also to the body. Other things being equal, the man who thinks wholesome, generous and charitable thoughts is healthier and happier than the man who does not."

So, smiling is a decision. Its deciding to be happy. Choose happy thoughts and magnify those. Weed out the garden of negative, destructive, hateful, resentful, critical thoughts. They are only thoughts! Smiles cost nothing, but when spread they bring much good. Friendliness is the way! We must realize that we are all one and get rid of coldness in the world NOW! We must love our way out of war. Weapons will not do it, but smiling and love will.