Quest for a quiet mind

Came across another thought provoking passage from the book " Krishnamurti's Notebook"

"The brain is nourished by reaction and experience;it lives on experience.but experience  is always limiting and conditioning;memory is the machinery of action.without experience,knowledge and memory,action is not possible but such action is fragmentary,limited."

The starting point of a calm self is a calm mind. It is in this context that i am thinking about the above quote.before we try to have a quiet brain we need to understand a bit of its functioning. Krishnaji uses few terms which he has defined at various places. The definitions are based on my rudimentary understanding and and are my own words.

Experience: whatever happens to us as we go through life. the decisions we make,the decisions made for us, the job we do,the person we marry,the toothpaste we use all are experiences.

Knowledge:is derived from experience as we go through life we pick up ways to deal with those experiences ways are the sum total of our knowledge.

Memory : all this knowledge is stored in the part of brain known as memory.

Thought or our thinking process is a result of our experience,knowledge and memory.

To get on with life we obviously need to think.we also need  knowledge,experience and memory.Going to school is an experience. we need education to give us the knowledge to do a job.we need to store that information in our memory which we can use from time to time.So on the face of it this intellectual process,this interplay of knowledge,experience and memory is good for us and probably essential for our existence.

So thinking is good but what about excessive thought? what if we fill our brains with incessant thought? worry about the future/Laments about the past? What if the brain is so filled up that it is not present with us in the present? what if it is always ticking and never quiet? Quite chaotic isnt it?

So to have a quiet mind,we need to study this interplay of knowledge ,experience and memory. I intend to do that the next few days.