Mahasi Sayadaw

"Momentary concentration that focuses on mental or physical objects from moment to moment is called nondistraction , a mental state that is the opposite of restlessness. When momentary concentration be…"

"One who fails to observe mental and physical phenomena every time they arise cannot see them as merely mental and physical phenomena. Furthermore, one does not realize their causality, impermanence, u…"

"Doubt about the fact that insight wholesomeness consists of simply observing the presently arising mental and physical phenomena is also skeptical doubt. This doubt is so subtle that it is rarely dete…"

"Uncertainty about what is wholesome and unwholesome is called skeptical doubt . It is considered a hindrance to liberation as it hinders the arising of discriminating knowledge. A person who has doubt…"

"When one cultivates strong concentration by means of tranquility or insight meditation, the mind is no longer distracted by thoughts and other hindrances. Such pure concentration, continuously focused…"

"Sometimes the mind may wonder about practice itself. For example, the mind may wander off into analyzing whether an object was noted effectly, or sequentially, or vividly. The mind may wander off into…"

"A restless state of mind that wanders away from an object while observing it is a mental state called restlessness . It flies away from the object. Due to restlessness the mind cannot remain very long…"

"The Vammika Sutta likens skeptical doubt to a fork in the road. Say a traveler who is carrying many valuables arrives at a fork in the road; if he lingers there unable to decide which way to take, rob…"