This is Macbeth's sympathy with his own feelings, and his mistaking his wife's opposite state.
Ib. sc. 4.—
“Macb. It will have blood; they say, blood will have blood:
Stones have been known to move, and trees to speak;
Augurs, and understood relations, have
By magot-pies, and choughs, and rooks, brought forth
The secret'st man of blood.”
The deed is done; but Macbeth receives no comfort, no additional security. He has by guilt torn himself live-asunder from nature, and is, therefore, himself in a preternatural state: no wonder, then, that he is inclined to superstition, and faith in the unknown of signs and tokens, and super-human agencies.
Act iv. sc. 1.—
“Len. 'Tis two or three, my lord, that bring you word