The word meditation is used for many things today: relaxing, breathing, visualizing a beach. All of those can help. None of them is what the tradition means.
In the tradition, meditation has two great uses. The first you already know from Part II: understanding a self, in stillness, so that it can be removed. The second is quieter. It is letting the mind fall so still that the Being can be known directly, without words.
It is not thinking about the Being. Thinking is the mind talking to itself. It is not forcing the mind quiet, either. Force is only another thought. It is more like water left alone until the mud settles and you can see to the bottom.
Most sittings are ordinary. The mind wanders, you return, it wanders again. That returning is the practice. Now and then the mind goes quiet by itself, and something opens that you cannot describe. Do not chase it. It comes when you stop chasing.
Meditation needs no belief and no special place. It needs a regular time, a still body and patience. Five minutes a day kept for a month is worth more than one long, heroic hour.