R’ Avraham Hakohen Pam zt”l (Atarah L’Melech) would say: “"ולבן שנים מחלב' - Chazal comment regarding Yehudah’s blessing: ‘When a person displays the whites of his teeth (i.e. smiles) at his friend, it is more beneficial than giving him a cup of milk to drink.’ When we smile warmly at another person, we make him/her feel good. We can do great acts of kindess with a simple smile or friendly word and pull a person out of his troubled mood. R’ Yisroel Salanter said, ‘Our heart is a ‘reshus hayachid’ but our face is a ‘reshus harabbim’.”
A Wise Man would say: “It is better to fail in originality than to succeed in imitation.”