Isaiah 14:12-15 records the fall of Satan. Created as God's archangel, we read about the dissatisfaction that got him in trouble,
"How you are fallen from heaven, O Lucifer, son of the morning! How you are cut down to the ground, you who weakened the nations! For you have said in your heart: ‘I will ascend into heaven, I will exalt my throne above the stars of God; I will also sit on the mount of the congregation on the farthest sides of the north; I will ascend above the heights of the clouds, I will be like the Most High.' Yet you shall be brought down to Sheol, to the lowest depths of the Pit."
Clearly his problem was pride. "I will, I will, I will…I am going to be like God." He wasn't satisfied with being the archangel that God had created him to be. He wanted to take God's place.
The root of Satan's pride was his discontent with the post and station that the supreme Monarch of the universe had assigned and allotted him. He thought he deserved better.
We all have our sphere of influence, and we all have our gifting from God. Your sphere of influence and gifting are different than mine, and mine are different than yours. It is unwise to desire something that someone else has rather than exploring what God has given you and developing that to its highest potential.
When you look over the fence, it looks like the grass is greener on the other side, but when you hop over, you find out it is spray-painted!
You will only be satisfied if you will develop what God has put inside of you and take that to its highest level possible. That is what you will be rewarded for.