Many people give the advice, "Follow your heart" or "Go with your gut."
I think there is a place for following your heart. Your heart can tell you your passions, your deepest desires. It can lead you to the person that you will spend all your life with.
However, your heart is only a start.
Your heart can point you in the right direction, but once you have chosen that direction, you sometimes have to lead your heart.
For instance: Let's say you fall in love with someone. You follow your heart and decide to marry them. However, you soon get used to them and see someone else intriguing in the work place.
Your sinful heart might tell you to follow that new attraction.
This is a time when you have to lead your heart. You have already chosen one path, it is time to make a decision to lead your heart down that path.
Going with your gut and following your heart can be a good place to start, if your gut and heart are in tune with God's, but it's just a starting point. Sometimes you have to lead your heart.