It feels different when your spouse supports you than when your parents and siblings and coworkers do. Your spouse knows you on an intimate level that no one else does. To have a person in your corner that knows all your ugly truths, all your pitiful faults, and stands there with pride in their eyes and love in their hearts: that makes the difference. It gives you a feeling of significance. You feel important in a way that you have never felt before.
This feeling of importance gives a person the confidence to pursue their dreams. A well-loved person who has an emotional safety net at home can spread their wings and leap off cliffs to find their bliss because they know, no matter their success or failure someone is waiting at home to validate them. Not only are they our support for our dreams and make us feel like we can move mountains, but we give the same gift to our spouses.