Of the imperial theme.

Macbeth. Act i. Sc. 3.

And make my seated heart knock at my ribs,

Against the use of nature. Present fears

Are less than horrible imaginings.

Macbeth. Act i. Sc. 3.

Nothing is

But what is not.

Macbeth. Act i. Sc. 3.

If chance will have me king, why, chance may crown me.