An enlightened person understands that there is nothing to be gained by thinking about others. Pure thoughts and feelings will do all the work. There is no need to think any further.
The quality of your thoughts will affect your spiritual endeavour. So keep checking them. If you don't, then at some point your mode of thinking will become quite ordinary, no longer spiritual. The sign of this is that your mind begins to; race and you start reacting sensitively to little things. You become vulnerable not just to the opinions of others but even to your own limited way of understanding.
Thoughts can be your best friend or your worst enemy.