Sit in meditation, but do not think. Look only at your mind. You will see thoughts coming into it. Before they can enter, throw these away from your mind until your mind is capable of entire silence.
I am discovering that Silence is not a concept, an idea, not the familiar "absence of sound." Instead, I "enter" silence as if I were to open a door, cross a threshold, and enter a room. Silence is substantive, tactile, like material. I feel its layers. It has depth like water, shallow or deep. I immerse myself in it. It is like water, supportive. I lay back in it. It is buoyant or it can draw me down. I think about whether or not it has a bottom, a ground. Perhaps its bottom turns into a top at some point, just as going east eventually leads west. I feel secure in the way it totally envelops. It is pleasurable yet mysterious.
Mark Van Doren wrote about "the [silent] web of the world, how thick and how thin, ancient and full of grace." What a lovely vocation for me to spend the rest of my years playing with the secrets of that shining place.