Spread Smile not fear and tears !!
And Please don't loot somebody else's happiness & joys, create ur own if u can. Smile is the only medicine which if taken at regular intervals can make you free from sorrows, jealousy, enemity & undue interferences in others life.
If u slap someone he will definitely slap u whenever he get chance, if u spread smile or happiness he will return it back may be in his dreams only but he will for sure, Always remember Newton's 3rd Law it works & will work forever - "Every action has an equal & opposite reaction".
Though I am not a teacher & everything shared here is not useful for everyone but someone need it !!