Your face telegraphs your attitude towards life, others and about yourself. Your countenance creates a climate that attracts people toward you or causes them to move away from you.
When you smile first, you have decided the direction the relationship will go.
“Who is as the wise man? and who knoweth the interpretation of a thing? a man’s wisdom maketh his face to shine, and the boldness of his face shall be changed.”
(Ecclesiastes 8:1)