We point our compass to the direction we want to head in.

We start acting on our understanding of the "right" way to get there. We make some progress and, eventually, veer off course.

What was once right becomes "wrong."

We get the map out, consult with experts, and update our understanding—and off we go again, moving forward based on our new understanding of what right is.

We make a little more progress and, soon enough, we are lost again. Right becomes wrong.

We do more investigation, more self-inquiry, more consultation, and we're back on our way.

And on and on like that (via tremendous amounts of trial and error), until we finally get where we want to go.

What is most important throughout is to keep the compass steady. Some have called this "one-pointedness of mind."

Every time you change your heading, you have to go back to the beginning of the game.