If all good things come from heaven, where did Lucifer get the mindful
thought to be jealous of God. In other words, where did he get his wicked
ways from in the first instance? God loves us so much and He knew man
would not be able to resist Satan’s wicked ways so why do you think God
cast him and his followers from heaven to roam the earth and corrupt man?

I will assume that you are aware of the doctrine of free will. It is clear
from scripture that for whatever reason, God has given human beings the
ability to choose whether or not to do what is right. “And if it seems
evil to you to serve the Lord, choose for yourselves this day whom you
will serve, whether the gods which your fathers served that were on the
other side of the River, or the gods of the Amorites, in whose land you
dwell. But as for me and my house, we will serve the Lord.” (Joshua 24:15)
It is my experience that all those who understand that God has allowed us
to choose whether to do right or wrong feel honored and loved for God
treating us this way. Whether we agree with it or not, it is a fact that
God gives us freedom to do good or evil.

It is very easy to demonstrate from scripture that humans have free will.
It is a bit harder to find clear proof from the Bible that angels have the
same free will. However, as God saw all of his original creation as good
(Genesis 1:31), I would assume that God did not create anyone
intentionally to be evil, and that would include the angels. In that case,
the only logical conclusion one can draw is that Satan was an angelic
being who chose a very long time ago to rebel against the will of God.
This is the standard doctrine concerning Satan in most of Christian
theology. I will admit that there is some speculation here, as the Bible
does not supply a lot of detail, and besides there is no proof text I know
of to show that angels have free will, but I can only assume that Satan,
of his own free will, chose to sin and to leave fellowship with God the
Father. I suppose one could say that Satan became jealous of God’s power
for the same reason that most of mankind choose to abandon the authority
of God and to take authority unto themselves and to live a life of sin.

Your second question is why God sent Satan to roam the earth. Questions of
this sort often require some speculation as it seems that God does not
always explain his motives for the things he does. It is true that
Revelation chapter twelve describes Satan being beaten in a heavenly
battle and coming to make war on mankind: especially the church. It is
also true that Revelation chapter 19 tells us that ultimately Satan will
be cast into Hell. Job chapter one implies that God allows Satan at least
some freedom to tempt us in order to test our faith in him and to
discipline us. Satan is called the king of this world (Ephesians 2:2).
From these things I conclude that God created Satan out of love with the
freedom to choose to do good or evil. When Satan, out of jealousy of God’s
power, chose to rebel, it led him on a path which caused him to be cast
out of heaven and the presence of God. Exactly why God chose to send Satan
to roam the earth and to allow Satan some freedom to act here on earth, I
am afraid I cannot really give a totally satisfactory answer, but I do
know that in resisting Satan, we become strong and learn to rely on God,
which is God’s plan for our lives. We know that in the end, there is no
doubt that the ultimate victory will be for those who choose to follow
God, because Satan will, in the end, be cast into the lake of burning fire.

John Oakes, PhD