Concentration is a cornerstone of mindfulness practice. Your mindfulness will only be as robust as the capacity of your mind to be calm and stable. Without calmness, the mirror of mindfulness will have an agitated and choppy surface and will not be able to reflect things with any accuracy.
Jon Kabat-ZinnThere are a lot of different ways to talk about mindfulness, but what it really means is awareness.
Jon Kabat-ZinnThe awareness is not part of the darkness or the pain; it holds the pain, and knows it, so it has to be more fundamental, and closer to what is healthy and strong and golden within you.
Jon Kabat-ZinnWhen we let go of wanting something else to happen in this moment, we are taking a profound step toward being able to encounter what is here now. If we hope to go anywhere or develop ourselves in any way, we can only step from where we are standing. If we don't really know where we are standingโa knowing that comes directly from the cultivation of mindfulnessโwe may only go in circles, for all our efforts and expectations. So, in meditation practice, the best way to get somewhere is to let go of trying to get anywhere at all.
Jon Kabat-Zinn