Once you realize that all thought is the construct  of the "personal I" (ego), you will naturally loosen your identity with thought ( I am this, I am that, I have done this & I have done that, etc.) From here you will know the freedom to be... 

When something you experience upsets you or elates you, notice how you have a thought with the feeling, or a feeling & a thought....you are neither, it is all thought, the construct of a personal I which is not you!

Once your attention is aware of this you will be less attached to thought and the peace that you are, begins to permeate. This is not an "aha" or a revelation, this is simply who you have always been & will be.