he heavenly eye penetrates what is without obstruction;

The flesh eye sees obstacles and does not penetrate.
The Dharma eye can contemplate only the relative truth;
The wisdom eye can contemplate and know true emptiness,
While the Buddha eye blazes forth like a thousand suns.
Although the Five Eyes functions differ, Their substance is of one source. (SPV 69)

“Even though one may be able to use these powers, it is better not to do so; for whenever things are looked at, a thought is spent, and adding a thought is not as good as diminishing one. To use the Five Eyes is to indulge in thought, and although such thoughts differ from ordinary ones, they are still not beneficial. It is always better to have one false thought less than to have one more.” (SPV 69)

Heavenly Eye
“With the Heavenly Eye you see without obstruction. You can see the Buddhas, spirits, ghosts, and gods in the heavens. You can see everything that they are doing. That is even better than the closed circuit TV that the international spies use. It’s not as much trouble either, and the best part is, it’s all internal. You don’t need any external help to know what’s going on.” (SM II 89)

Flesh Eye
“The Flesh Eye sees obstructions and doesn’t penetrate. The Flesh Eyes sees things that have form. The Heavenly Eye can’t see things with form. The Flesh Eye does not refer to the regular eyes in our physical body. It is another, different eye. The Heavenly Eye can’t see physical things, but it can see ghosts, gods, and so forth. The Flesh Eye can see things with physical form and also things without physical form. If you open your Flesh Eye you can see the people in the room with you, and you can also see the people outside the room. Walls present no obstacle to your vision.” (SM II 90)

Dharma Eye
“The Dharma Eye contemplates the common truth, which is also called the conventional, relative truth, or wonderful existence. If this eye is opened, there is no need to use books in order to read sutras, since the entire extent of space is seen to be full of limitless Dharma treasures.” (SPV 69)

Wisdom Eye
“The Wisdom Eye contemplates true emptiness; one understands and certifies to the principle of true emptiness and is filled with the Dharma bliss of true emptiness.” (SM II 90)

Buddha Eye
“The Buddha Eye is like a thousand suns, shining everywhere, illuminating the one substance underlying all diversity. It shines on different things, but underneath, they are all one substance. The Buddha Eye is the most perfect of the Five Eyes. It surpasses the other four. With it one can see people and ghosts, spirits, and everything else, both physical and nonphysical.” (SM II 90)

五眼