Spiritual healers attract to themselves the assistance of discarnate entities and spiritual beings who are ‘vibrating’ or ‘existing’ on roughly the same frequencies of soul-development and thought-levels as themselves.
If healers want the highest guidance and the most pure form of healing energy transmitted through them, then they need to set their levels of spiritual development, compassion and understanding as high as possible.
The universal Law of Attraction states that we draw to us what we are, and not what we profess to be. Genuine spiritual healers are motivated by love and service.
With regard to professional development: no healer is ever fully developed - the potential for continuing personal development is neverending.