“Meditation develops your innate energies. With practice, you can take charge of your mind and body, preventing disease before it arises. Shouldn’t everyone make an effort to learn something like this? Superficially, meditation looks easy, but if you practice without patience, determination, and a long-term sense of devotion you will never realize its benefits. To give readers a guide to meditation, I have therefore summarized my many decades of experience.”
Yin Shi Zi, October, 1954

“To meditate means to realize the imperturbability of one’s original nature. Meditation means to be free from all phenomena, and calmness means to be internally unperturbed. There will be calmness when one is free from external objects and is not perturbed.”
Bruce Lee

Another great and very clear book on meditation is Yin Shi Zhi’s Tranquil Sitting: A Taoist Journal on Meditation and Chinese Medial Qigong .  It sounds imposing but it isn’t.  It contains very clear and practical instruction on how to meditate.