Malcolm discusses his distrust of everyone around him with Donalbain, and expresses his desire to escape to England
What will you do? Let's not consort with them: To show an unfelt sorrow is an office which the false man does easy. I'll to England.
Donalbain mirrors Malcolm's worry about the murder of Duncan, and decides to escape to Ireland for safety
To Ireland, I; our separated fortune shall keep us both the safer: where we are there's daggers in men's smiles: the near in blood, The nearer bloody.
Malcolm explains that they should both leave Scotland to avoid being killed by Duncan's Murderer
This murderous shaft that's shot hath not yet lighted, and our safest way is to avoid the aim. Therefore to horse; And let us not be dainty of leave-taking, but shift way: there's warrant in that theft which steals itself when there's no mercy left.