Now does he feel
His secret murders sticking on his hands.
Now minutely revolts upbraid his faith-breach.
According to this passage, constant "revolts" (that is, rebellions) are a reaction to Macbeth's own treacherous behavior. Minutely here means "happening every minute; constantly."
My way of life
Is fall’n into the sere, the yellow leaf,
And that which should accompany old age,
As honor, love, obedience, troops of friends,
I must not look to have, but in their stead
Curses, not loud but deep, mouth-honor, breath
Which the poor heart would fain deny and dare
not.
Canst thou not minister to a mind diseased,
Pluck from the memory a rooted sorrow,
Raze out the written troubles of the brain,
And with some sweet oblivious antidote
Cleanse the stuffed bosom of that perilous stuff
Which weighs upon the heart?
If thou couldst, doctor, cast
The water of my land, find her disease,
And purge it to a sound and pristine health,
I would applaud thee to the very echo
That should applaud again.
act between parties with a view to reconciling differences
Thoughts speculative their unsure hopes relate,
But certain issue strokes must arbitrate;
Towards which, advance the war.
To arbitrate is to decide or settle a problem. In this passage, Siward suggests that fighting (i.e., the strokes of swords) must settle the differences between Macbeth and the other thanes.
be deliberately ambiguous or unclear in order to mislead
And be these juggling fiends no more believed
That palter with us in a double sense,
That keep the word of promise to our ear
And break it to our hope.