From the Course in Miracles Text 28.I:
"The miracle comes quietly into the mind that stops an instant and is still. It reaches gently from that quiet time, and from the mind it healed in quiet then, to other minds to share its quietness. And they will join in doing nothing to prevent its radiant extension back into the Mind Which caused all minds to be. Born out of sharing, there can be no pause in time to cause the miracle delay in hastening to all unquiet minds, and bringing them an instant's stillness, when the memory of God returns to them. Their own remembering is quiet now, and what has come to take its place will not be wholly unremembered afterwards."
Nothing more need be said I suppose. I spend time with a quiet mind. I intend to be in quiet as much as possible for life. I believe that if I am just quiet in my thoughts then two things happen: a) I stop projecting ego nightmares of fear and hatred on the world, and b) the Holy Spirit has access to my mind to use it for healing all minds. I just need to let go. No, I don't think I'll get Alzheimer's disease because I didn't keep my brain active. No, I don't fear all the other tales of old age diminishment. I believe in God.
It is hard to describe how satisfying it is to sit with a quiet mind.
This morning, I worked out on the machines for 30 minutes and the ran 52 minutes on the hills. this evening, I skipped my evening exercise and sat in silence.