Another important practice taught by the Buddha is the restraint of the senses ("indriyasamvara"). In the various graduated paths, this is usually presented as a practice which is taught prior to formal sitting meditation, and which supports meditation by weakening sense desires that are a hindrance to meditation. According to Anālayo, sense restraint is when one "guards the sense doors in order to prevent sense impressions from leading to desires and discontent." This is not an avoidance of sense impression, but a kind of mindful attention towards the sense impressions which does not dwell on their main features or signs ("nimitta"). This is said to prevent harmful influences from entering the mind. This practice is said to give rise to an inner peace and happiness which forms a basis for concentration and insight.