Sentient being is one of the most misunderstood and misused concepts in Mahayana Buddhism and should be thoroughly penetrated and understood or you will completely miss the point of the Bodhisattva Vow and the ending of mental anguish by the release of all sentient beings. Sentient beings are mental entities such as perceptions, beliefs, opinions, attitudes, desires, moods, values, prejudices, convictions, assumptions, preconceptions, biases, habit patterns, dispositions, sentiments, judgments, addictions, impulses, compulsions, compunctions, obsessions, scruples, delusions, views, concepts, thoughts, ideas, etc.,