In man’s positive activities cognition is a process of grasping what the given object is and how it moves and develops, realizing its interests and a process of planning and designing how to change it in accordance with his demand.

In man’s positive activities, practice is a process of applying his strength directly to an object on the basis of cognition, a process of changing the object so that it can serve him and a process of creating new material and cultural wealth.

Cognition and practice are correlated closely with each other.

In general, people’s practice presupposes cognition, and it is based on correct cognition. Only then, can the former have scientific orientation and ways and do everything with success.

Cognition should be combined with practice and made in practice. Only then, is it possible to understand the objective world correctly.

Practice is a starting point of cognition and a yardstick of truth.