Once you replace negative thoughts with positive ones, you'll start having positive results - Negative Thoughts Quotes
You can’t stop the negative thoughts from coming, but you can choose to not let them take root - Joel Osteen Quote
Positive people also have negative thoughts, they just don't let those thoughts grow and destroy them.
Two things to remember in Life. Take care of your thoughts when you are alone and take care of your words when you are with people.