In karate there is an image that’s used to define the position of perfect readiness: “mind like water.” Imagine throwing a pebble into a still pond. How does the water respond? The answer is, totally appropriate to the force and mass of the input; then it returns to calm. It doesn’t overreact or underreact.
The power in a karate punch comes from speed, not muscle; it comes from a focused “pop” at the end of the whip. That’s why petite people can learn to break boards and bricks with their hands: it doesn’t take calluses or brute strength, just the ability to generate a focused thrust with speed. But a tense muscle is a slow one. So the high levels of training in the martial arts teach and demand balance and relaxation as much as anything else. Clearing the mind and being flexible are key.
Anything that causes you to overreact or underreact can control you, and often does. Responding inappropriately to your e-mail, your staff, your projects, your unread magazines your thoughts about what you need to do, your children, your boss will lead to less effective results than you’d like. Most people give either more or less attention to things than they deserve, simply because they don’t operate with a “mind like water.”
At it states, "We use the term "Mind like water" to illustrate the adaptive nature of the Zen/Enlightened mind. One may think of this metaphor in terms of its benevolent aspects. However, water has no fixed form. It accords with the nature of the environment and conditions it accounters. It has no intent. It just flows and adapts."