There is an interesting connection I’ve noticed first hand, between some masters and their science-crafts.
The best guidance from Gurus comes when their only goal is the benefit of those who seek their help.
The best readings from astrologers come when they have no ulterior motives.
The best suggestions from palmists come when they take no money in return.
The best nadi analyses from ayurvedic doctors comes when their sole aim is the patient well being.
The best healings from Reiki practitioners come when they tirelessly want their patrons to be rid of all negative energies.
All of these sciences / skills require a certain amount of intuition. Intuition is nothing but the Lord working through us. Said differently, it is the Consciousness within that delivers the appropriate messages utilising the body as an instrument. When the channel is pure, intuition flows. When the channel is blocked by ego / desire / selfishness, there is little room for anything else.