The Sacral is our energy center where our personal passion for life is stored. In this center, all of our relationships, external to ourselves, are expressed. It's in this Chakra that all the passion a person has for life originates; passion for their career, their interests, the roles they play in life (mother, daughter, sister, friend, lover, employee, etc..), and the interpretation of love they receive from others - platonic or romantic.
This is the center where we experience balance or imbalance in sexual relationships, in how we express and receive love for our children or others, or in how we experience and express ourselves in our hobbies, interests, and career.