A teaching from Künzang Dorje Rinpoche

"As to how we should meditate, it's important to break sitting into short sessions. Meditation doesn't require sitting for long stretches as if there were value merely in not moving. It's better to meditate for short periods rather than long session that have no result. When drops of water accumulate they gather momentum but each drop is separate. Each drop is unique. Meditation sessions should accumulate in the same way."

p363 Wisdom Eccentrics, Ngakpa Chögyam, Aro Books, Inc, 2011, 978-0965394864