Fair is foul, and foul is fair, hover through fog and filthy air.
— William Shakespeare
Tempting Darkness In Macbeth quotations
The instruments of darkness tell us truths.

My hands are of your color, but I shame to wear a heart so white.

Is this a dagger which I see before me, The handle toward my hand?
Better be with the dead, Whom we to gain our peace, have sent to peace, Than on the torture of the mind to lie In restless ecstasy.
Still it cried ‘Sleep no more!’ to all the house: ‘Glamis hath murder’d sleep, and therefore Cawdor shall sleep no more,—Macbeth shall sleep no more!

Or art thou but / A dagger of the mind, a false creation, / Proceeding from the heat-oppressed brain?
Out, damned spot! out, I say! One: two: why, then 'tis time to do't. Hell is murky!
Stars hide your fires; let not light see my black and deep desires: The eyes wink at the hand; yet let that be which the eye fears, when it is done, to see

Receive what cheer you may. The night is long that never finds the day.
Maybe because Im a nice and sweet person in life, I like the darker roles.
The really dark one is Lady Macbeth.
There's husbandry in heaven; Their candles are all out.

And nothing is, but what is not.
My thought, whose murder yet is but fantastical, Shakes so my single state of man That function is smothered in surmise, And nothing is but what is not.
And oftentimes, to win us to our harm, The instruments of darkness tell us truths, Win us with honest trifles, to betray's In deepest consequence

In the description of night in Macbeth, the beetle and the bat detract from the general idea of darkness - inspissated gloom.
To show an unfelt sorrow is an office Which the false man does easy.
But I remember now I am in this earthly world, where to do harm Is often laudable, to do good sometime Accounted dangerous folly.