What the mind dwells upon, the body acts upon. (Denis Waitley, motivational speaker)
Our actions are determined beforehand by our thoughts. Occasionally, we may act instinctively without much thought, but that’s pretty rare. Most of the time, we do what we do because we’ve thought about it—whether it’s good or bad. So, it’s very important that we think right thoughts. What and how we think determines pretty much how we act and what we do.
Whatever is true, whatever is noble, whatever is right, whatever is pure, whatever is lovely, whatever is admirable—if anything is excellent or praiseworthy—think about such things (Philippians 4:8).