What is revealed about Macbeth's character in his first two soliloquies, near the end of Act 1 and the beginning of Act 2?

Macbeth's first two soliloquies, at the end of Act 1 and the beginning of Act 2, are similar in some ways, and different in others. Macbeth tries to decide whether or not to kill Duncan in the first soliloquy, and in the second is responding to a vision of a dagger pointing to Duncan's chamber. In his first soliloquy, Macbeth cannot decide whether to kill Duncan in the hope of taking his place as king. At first …

…it "in a form as palpable / As this which now I draw". It starts spurting blood, symbolising the blood of Duncan. In these two soliloquies, a lot is revealed about Macbeth's character. The way he thinks about why and why not he should kill Duncan, and his overall decision not to murder Duncan in the first soliloquy shows that he is not simply a vicious cold-blooded killer, but that he is actually a tragic hero.