What are four reasons macbeth hesitated to kill the king? So far I think it is because he is a friend, subject, and good person.

In lines 7 - 25 of Act 1, Scene 7  Macbeth states the arguments against killing Duncan  -

vengeance - the killer will be killed

kinship - to you don't kill your relatives

loyalty - you don't kill your king

hospitality - a host dosen't kill his guest

duncan's goodness - you dont kill a virtuous king 

religion - the killer is damned for eternity

pity and horror - murder is unnatural to innocent humanity and to heaven

hope that helps. i fink its a good answer cos im a brittish kid. ha jks