Bringing Out the Luminous Aspect of Mind
It depends on how your meditation experience is going. If you are experiencing dullness, use the space probing samādhi; if agitation, use the earth probing.
It could also be that you are involved in agitation during the first part of the session, in which case you should use earth probing, and dullness during the last part, then use space probing.
Meditating on the one, the samādhi probing the depths of the earth, to bring the mind down if it is flighty due to being involved in an agitated state, and the other, the samādhi probing the depths of space, to lift it up if it is down due to a state of dullness-these two focal devices will bring out the luminous aspect of mind.
One-pointed samādhi arises, and the respective faults and hindrances are removed.
Composed by Khenpo Tsultrim Gyamtso Rinpoche, at Rocky Mountain Dharma Center, in the summer of 1991. Commentary on Ocean of True Meaning.
Translated by Jim Scott.