Sickness are the brooms sweeping your evil deeds. Seeing the sickness as the teacher, pray to them… Sickness are coming to you by the kindness of the masters and the Three Jewels. Sickness are your accomplishments, so worship them as the deities. Sickness are the signs that your bad karmas are being exhausted. Do not look at the face of your sickness, but at the one (the mind) who is sick. Do not place the sickness on your mind, but place your naked intrinsic awareness upon your sickness.
This is the instruction on sickness arising as the Dharmakāya. The body is inanimate and mind is emptiness. What can cause pain to an inanimate thing or harm to the emptiness? Search for where the sickness are coming from, where they go, and where they dwell. Sickness are mere sudden projections of your thoughts. When those thoughts disappear, the sickness dissolve too… There is not better fuel than sickness to burn off the bad karmas. Don’t get into entertaining a sad mind or negative views over the sickness, But see them as the signs of the waning of your bad karmas, and rejoice over them.