Your mind does not belong to you. Don’t blame it. Let the big Self, embrace it. Effort is the key in the relative, effortlessness is the key to the absolute.
There are three kinds of understanding, intellectual understanding, experiential understanding and existential realisation. Intellectual understanding says “yes”, it agrees. Experiential understanding feels, it's obvious. Existential realisation is irrefutable, it becomes your very nature.
If you have only an intellectual understanding, you will think you know everything. Most theologians are in this category. You can know intellectually that you are hollow and empty but sitting and feeling you are hollow and empty is totally different. All that you hear will simply remain a jumble of words if there is no experiential understanding, which is more on the feeling level. When you have an experience, you want to understand more about it and so you become a seeker.
Existential realisation contains within it both experiential and intellectual understanding and yet it is beyond both of these. How do you achieve existential realisation? There is no way to achieve it. When the fruit becomes ripe, it falls.
What is peace? It is an undivided mind.