 Restricting the account to the consciousness process of ordinary beings, two types of process are described: five-sense-door processes (pañcadvāra) and mind-door processes (manodvāra). These may occur in succession, or mind-door processes may occur independently. Five-sense-door processes account for sensory perception as information is directly received from the fields of the five physical sense faculties. Mind-door processes internalize the information received through the sense faculties and characterize the mind that is absorbed in thought or memory. Objects at the “door” of the mind, which is treated in Buddhist thought as a sixth sense faculty, may be past, present, or future, purely conceptual or even transcendent. Normally, however, the object at the mind door will be either a past memory or a concept. If there is no perceptual activity, as is the case in deep, dreamless sleep, the mind is in a state of rest called inactive mode (bhavaṅga). Throughout one’s life, the same type of citta performs this function of the inactive mind that is the natural mode to which the mind reverts. The mind switches from its inactive mode to a simple mind-door process when a concept or memory occurs and no attention is directed to the other five sense fields. The simplest mind-door process is a succession of the following functions: 1) adverting to the object of thought: a function that lasts one moment and becomes internalized as an object support; 2) impulsion: occurs for up to seven moments and performs the function of the mind’s responding actively to the object with wholesome or unwholesome karma; 3) retaining: holding on to the object of the consciousness process for one or two moments.