A smile is a powerful means of communication. It is made up not only of parted lips, but also of eyes, which sparkle or weep, eyes, which are full of tenderness, acceptance, humor, forgiveness, love and compassion.
'A smile costs nothing, but gives much. It enriches those who receive without making poorer those who give. It takes but a moment, but the memory of it lasts forever. It brings rest to the weary, cheer to the discouraged; sunshine to the sad and it is nature's best antidote for trouble, for it is something that is of no value to anyone until it is given away. Some people are too tired to give you a smile. Give them one of yours, as none needs a smile so much as he who has no more to give.'
This is the colour version of Samyuktha that was posted earlier.