what are the lines that express macbeth's confidence in act 5 scenes 2 and 3

These lines come from Act V scene iii-

The mind I sway by and the heart I bear

Shall never sag with doubt nor shake with fear.

Macbeth is recounting what he believes is the invincibility that the witches revealed to him in their final predictions. Unfortunately his faith in them is ill-founded as each of the predictions he interprets as making him invincible actually indicate the process of his downfall.