By faith Moses, when he had grown up, refused to be known as the son of Pharaoh's daughter. He chose to be mistreated along with the people of God rather than to enjoy the pleasures of sin for a short time.
Moses had the chance to align himself with the rich and the famous. He had the opportunity to really make it in this world. To be the son of Pharaoh's daughter, the possibilities could have seemed endless.
The world wants to paint that picture for us. A place that is endless in possibility. But Moses knew that the pleasures of sin only last a season. He knew that to truly have endless possibility, it would require the alignment with the people of God, so that is exactly what he did.
How did he know to do this? How did he know that he couldn't continue on with pharoah? The answer to that is Faith. It was faith that brought sight to this man. It is faith that will allow you to see clearly in your decision making process.
Some other thoughts about this passage at this post.