How we see and what we do is a direct result of our thoughts. What you thought will be seen on your face in form of aura. If you change your behavior unnecessarily but your face will tell everything happening inside your mind.
Your thoughts make long lasting effect on your life. Everything what is made is first visualized in mind via thought and then real life implementation happens. The environment nearby the positive person will be pleasant compared to those who are completely negative person. Not only speech but also your thoughts makes effect on others. Person will be quickly judge by his speech and speech is result of thought. Your speech and words will be stored by your nearby people and this is how they will treat. Bad words will spoil the relation and good words make the relationships. Thus, thoughts are everything.