Whether you are going or staying or sitting or lying down, the whole world is your own self. You must find out whether the mountains, rivers, grass, and forests exist in your own mind or exist outside it.
Analyze the ten thousand things, dissect them minutely, and when you take this to the limit you will come to the limitless, when you search into it you come to the end of search, where thinking goes no further and distinctions vanish.
When you smash the citadel of doubt, then the Buddha is simply yourself.
—Daikaku
Great words from Daikaku!