Paying attention is a mental state of concentration and of a specific focus on a particular mental process. In order to get most out of information receiving, it is necessary to practice attention and to consciously control concentration. Attention belongs to mental states and it is a transient phenomenon by its nature. There are quantitative and qualitative values of attention, that depend on the circumstances influencing an individual at a given time. In order to attract its functions during focusing on a selected subject, it is important for the nervous system to sufficiently activate itself either consciously or unconsciously, according to the nature of the impulse.