Contemplate the workings of this world, listen to the words of the
wise, and take all that is good as your own. With this as your base,
open your own door to truth. Do not overlook the truth that is right
before you. Study how water flows in a valley stream, smoothly
and freely between the rocks. Also learn from holy books and
wise people. Everything - even mountains, rivers, plants,
and trees - should be your teacher.
- Morihei Ueshiba