One who protects himself from negative thoughts protects himself from negative outcomes.
Never give a negative thought an inch or it will take a mile.
There is too much negativity in the world. Do your best to make sure you aren't contributing to it.
Incorporate daily programs on positive thinking as a counterbalance against the negativity you may encounter in pursuit of your dreams.
When you have higher thoughts, rid yourself of anything that threatens to lower them.
Keep negative people in your prayers, not in your life.
Rise against every negative thought that rises against you.