No, He thought he was as important as God, but God kicked him out of Heaven with his band of idiots (fallen angels). His only goal now is to get as many people out of the will of God as he can, and have company as he's taking his punishment for the rest of eternity in the Lake of Fire.
People need to understand that God is not threatened by anything Satan or man can do. He tries to help man. All of the words He's spoken years ago, are just as valid as they were when He said them, and will be forever. Everything He says is true. He can't lie. Because we are in a sinful state, we are the one's who are not worthy to even look at Him. But that's why He sent His son (the Saviour)....to take that punishment we deserved, because only a pure (without sin) being could take the punishment meant for us. The only thing He asks us to do is acknowledge Him, accept his son as Saviour, make Him God of our life, and do what He says to do by putting away the sinful things that keep us from getting close to Him.
Ok,..... it seems your answer according to biblical accounts, etc. But how did he develop this spiteful lust for God's power? I understand that according to the story, he became envious and angry at God, and several people have offered that as an explanation. But how did he develop such evil thoughts and desires in the first place?
That's what I've been asking.I suppose if anyone believe in the Jesus Christ, Bible (Words of God) goes to heaven but will you still have own your free-will just like Lucifer was in the heaven?

in heaven you will live forever, there will be no heartache, sorrow, only happiness 