What happened to punctuation and capitals? Someone stole some of the Greek spelling rules!
OK, verbatim won't really work so, as close to the original as it goes without butchering English altogether,
"Always smile in your life (I know how it sounds! It's basically an 'always smile'). Don't let anything bad affect you (verbatim: no bad (thing) should affect you/may no bad thing affect you -could be both). Never stop being so pleasant".