Why is McMurphy trying to draw the patients out of the fog?

The patients in the ward have been brainwashed and drugged or treated to the point of complete complacency. The fog they surround themselves with keeps them safe, fear and domination causes them to retreat. Mc Murphy persists in trying to make the other patients understand the reality of their condition and help them break free, because unlike the others, he sees the reality for what it is and refuses to conform.