A teaching from Künzang Dorje Rinpoche

"The most important thing with Dzogchen is presence of awareness. There are all kinds of obstacles to presence of awareness. The first is the obstacle of laziness and the second is forgetfulness. Even having received pointing out instruction we tend to forget. The third obstacle is depression Depression means blocking thought-the state where thought no longer arises."

p362 Wisdom Eccentrics, Ngakpa Chögyam, Aro Books, Inc, 2011, 978-0965394864