"Look at every path closely and deliberately. Try it as many times as you think necessary. Then ask yourself and yourself alone one question. This question is one that only a very old man asks. My benefactor told me about it once when I was young and my blood too vigorous for me to understand it. Now I do understand it. I will tell you what it is: Does this path have a heart? If it does the path is good. If it doesn't it is of no use. Both paths lead nowhere; but one has a heart, the other doesn't. One makes for a joyful journey; as long as you follow it, you are one with it. The other will make you curse your life. One makes you strong; the other weakens you."

Carlos Castaneda - From The Teachings of Don Juan

A Yaqui Way of Knowledge