Satan's thoughts

In book four Satan talks about how the sun reminds him of Heaven and then seems to express regret for his rebellion against God saying that praising God was the easiest way to repay his gratitude.  However, his ambition to want to become the highest caused him to only repay God in malice which then led to his downfall.  Also Satan confesses that God is invincible "Till Pride and worse Ambition threw me down/ Warring in Heav'n against Heav'ns matchless King" (4:40-41).  Satan claims that even if he was to submit to God and return to Heaven, he would soon rebel against God again because of  his ambition; however, after this time, Satan claims that he would fall to a different Hell that is even lower and worse than the one he is currently in which I find interesting.  Satan also calls himself Hell which can bring up many questions concerning if God is omnipresent and if Hell is just made by our minds.  At the end of the speech, however, is a particularly intersting part because Satan dismisses (says farewell) to all good and fully adopts evil just like Othello did.