Simply the mind itself
When looking into the nature of mind, don’t expect to gain some exceptionally high or profound realization, or to see anything new. Nor should you hesitate or doubt your ability to meditate. Just trust that the nature of mind is simply the mind itself left in an unaltered state, and do all that you can to sustain this, without distraction, at all times, during and between the meditation sessions. Don’t expect to gain realization in just a few months, or even years. Whether you develop any of the qualities that come from the practice or not, remain steadfastly determined and resolve to continue the practice with diligence, day and night, throughout this life, future lives and the bardo state.
– Dilgo Khyentse Rinpoche
With thanks to Just Dharma Quotes