If you’re feeling down and lonely, smile.  Why do songwriters write about it, singers sing about it?  For a smile can change your outlook in an instant.  The body is designed so that a smile instantly creates a flush of contentment.  It does, indeed take more muscles to smile than to frown, which is why you must make a choice.  All of life is about making choices.  That is how you evolve.  A genuine smile of compassion in the midst of challenges reflects much about the soul of the one doing the smiling.  What do you wish to radiate to the world?  What do you wish to find within you?  The smiles are already there in limitless supply.  Dig them out and spread them about liberally if you wish to be the change-maker.  You are so very loved.