Before having realized emptiness, it is not possible to truly free mind of concepts. Then, we can just adopt an approximate approach to all actions, which is relatively close to but not quite the real thing. For example, after we have learned the analytical techniques of Madhyamaka, we can fully appreciate the idea that phenomena manifest and, at the same time, are devoid of intrinsic reality, like dreams. However, this is just theoretical understanding, not true realization of emptiness.