You shouldn't go to a shrine or temple to pray just for your own profit and happiness.
この文章の中の「just」は違うところにも入れられます。
You shouldn't go to a shrine or temple to *just* pray for your own profit and happiness.
You shouldn't go to a shrine or temple to pray for *just* your own profit and happiness.
When you pray at a shrine or a temple, you shouldn't just pray for your own profit and happiness.
When you go to a shrine or a temple to pray, you can't just pray for yourself to be successful and happy. You have to pray for everyone too!
When you go to a shrine or a temple, it's unacceptable to pray only for your own profit and happiness. Pray for everyone's happiness!
３つのバージョンをご紹介しています。
「祈る」はpray、「…を祈る」は、pray for ...となります。
profitは「利益」、happinessは「幸せ」です。
以下の表現はどれも「…してはいけない」というニュアンスです：
you shouldn't ...
you can't just ...
it's unacceptable to ...
アメリカ合衆国 
