AHA! And there it is, staring at us in the face
I cannot remember who said it, and in which thread, but I remember reading someone having said "there is only true path of living, all others are false". The teachings in Sri Guru Granth Sahib Ji, we already know them, we have those values instilled in us from day 1. All that information we carry is staring at us in the face through Sri Guru Granth Sahib Ji. The writing in Sri Guru Granth Sahib Ji is what our soul tells us every single day. How to live, how to treat other people, what to focus on, what to disregard, it's all soul vs body. Your soul will be telling you the objective truth, it doesn't matter how mad you are how hurt, there will always be a part of you that knows the difference between right and wrong. Your body, or more specifically your brain, is maya, it will be acting in the interests of worldly gains and pleasures.