When the lines are memorized. The actor begins to think in character. Every line should be kept alive by thinking.

Lines should never be gone through by rote, because it makes for a surface actor, and an audience quickly detects one who is.

The actors who sit in conversation are opened out. If this were not done, the audience at the side would see only the back of an actor's head. By opening out the audience sees part of the face. WHICH IS THE MOST EXPRESSIVE PART OF AN ACTOR'S BODY.

But there are times when an actor must be in profile, and/or turn his back on the audience. But then it is a planned movement and only for a short time.