This is from the Lords of Light.

We are talking about healing Mantras. If people are not Initiated but have a Mantra to prepare them for Initiation it is confusing to use both the healing and the personal Mantra.

The Mantras are specially sent down for people to use, so are good for Initiates. Our suggestion (N) is to reduce the number of healing Mantras to general ones – and some specific illnesses like Cancer. They will then automatically be Connected with the Individual. We will help you with this.
 
This is from Samuel.

I am very pleased to be able to help anyone with a genuine desire to be healed, that is, every night when they Meditate for as long as it takes. People need to be aware of the healing Energy coming into their Crown Chakra and permeating through the body.

Either to sit with the eyes open or shut. For people with Chronic or Serious Illnesses a Mantra is better.