That thought that just ran through your mind has power. Whether it is good or bad depends upon what It meant to you, how you received it, whether you empowered it and how you left it.
The decision to act on thoughts is a decision. The decision to do nothing is also a decision.
Many great thoughts have come through your mind already in this lifetime and many more will come. The question is, what will you do with them?
Are you maximizing your potential to heal, help and nurture the world or are you selfishly waiting to take advantage of unwary prey?
Try to grab the good thoughts. Release the bad ones. Your thoughts are powerful. Use them for good. Be as great as they are.