Read Proverbs 16:3  Have you ever thought a naughty thought?  Of course you have.  We all think bad thoughts.  But it is hard to get bad thoughts out of your head.  Let's try something: do not think about the color "blue".  That is the first thing that you think about, isn't it?  Even though you don't want to, you just think about the wrong things.  "So, how do I think the right thoughts?" you ask.  Our verse tells us.  If you keep on doing the right things, eventually you will think the right things.  If you think about being angry with your sister or brother; if you think about talking back to your mother; if you grumble because you don't get your way; all of those will make you think bad thoughts.  But if you make yourself be helpful to your brother or sister; if you make yourself be helpful to your mother; if you make yourself play what your friend wants to play, well pretty soon you will be thinking good thoughts.  Here is the formula for thinking good thoughts.  It is found in our verse.  Do the right things and pretty soon you will be thinking the right thoughts.  Our actions will produce our thoughts.