As others have said the answer is inside you. I like this which is in the book I linked earlier.
Yet the greatest reminder is not anyone outside you, but the voice within you. This is the first
tool that I use, because it is the most accessible.
The voice within is the loudest voice with which I speak, because it is the closest to you. It is
the voice which tells you whether everything else is true or false, right or wrong, good or bad
as you have defined it. It is the radar that sets the course, steers the ship, guides the journey
if you but let it.
It is the voice which tells you right now whether the very words you are reading are words of
love or words of fear. By this measure can you determine whether they are words to heed or
words to ignore.