The Tool Principle

The human body is the basic toolkit available for all human beings. Study and train it well and you can minimize the need of additional tools.

There are simple tools and complex tools. Learn to use and understand the simple tools well, and you may not need those complex tools at all.

If you use a tool, you may become too dependent on it. Therefore, you should frequently make sure that you could live without it.

If you use a notebook, you should also practice your plain memory.

If you use a calculator, you should also practice mental calculation.

If you use a washing machine, you should make sure that you remember how to wash without one.

If you use a transportation vehicle, you should also walk once in a while.