If you can maintain awareness in the states of agitation and meditative equipoise, the pollution of disturbing thoughts will clear automatically, just like a pond that is left undisturbed. Do not consider certain mental experiences as good and worth cultivating and other experiences as hindrances that need to be abandoned. If you can develop this attitude, your mind will gradually be emptied of its unconscious contents: The karmic traces and dispositions and all the obscurations.

Tilopa
quoted in the book The Ninth Karmapa, Wangchuk Dorje's Ocean of Certainty
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Further quotes from the book The Ninth Karmapa, Wangchuk Dorje's Ocean of Certainty:
- The root of samsara and nirvana
- Free from all empirical characteristics
- Relaxing in an unconditional state
- Mind’s reflections
- Maintaining awareness
- Realizing the nature of mind
- The way to rest the mind
- Diversity and unity