And what is the space element? The space element may be interior or exterior. And what is the interior space element? Anything internal, personal, that’s space, spacious, and appropriated. This includes: the ear canals, nostrils, and mouth; and the space for swallowing what is eaten and drunk, the space where it stays, and the space for excreting it from the nether regions; or anything else internal, personal, that’s space, spacious, and appropriated. This is called the interior space element. The interior space element and the exterior space element are just the space element. This should be truly seen with right understanding like this: ‘This is not mine, I am not this, this is not my self.’ When you truly see with right understanding, you grow disillusioned with the space element, detaching the mind from the space element.
Rāhula, meditate like the earth. For when you meditate like the earth, pleasant and unpleasant contacts will not occupy your mind. Suppose they were to toss both clean and unclean things on the earth, like feces, urine, spit, pus, and blood. The earth isn’t horrified, repelled, and disgusted because of this. In the same way, meditate like the earth. For when you meditate like the earth, pleasant and unpleasant contacts will not occupy your mind.