Martys lies afects the way he thinks because if he lies he might think it is om and keep lying
"Feeling appreciated is one of the most important things in a happy family. All of the family members should say how much they appreciate each other, how great it is that they have each other, how much they love each other, and how grateful they are for everything they do for each other."
If the sentence in question is a statement (ends with a period), I would probably "however" as your transition word.