心と精神と考えが揺れないためには、考えを目的としたところに集中し、考えを強くし、一ヶ所に力を入れるように、考えに力を入れなければならない。そうしてこそ、考えが他のところに外れない。
If you don’t want to be shaken in your heart, mind, and thoughts, you must focus your thoughts on the place you’ve purposed, make your thoughts strong, and concentrate your strength on the thoughts just like a person concentrates his strength in one area. Then your thoughts will not go off track to another place.
photo:「Billiard」by Mani from flickr