Backbone is the series of bones which extends from the skull through the center of the back and down to the pelvis. The backbone provides the chief support for your body. In real life activities and situations, there are people who are your backbone.
In the same way that a backbone provides chief support to the system, so are these people a huge source of support to you. They have supported you to where you are at this moment.
Without the support of your backbone, you lose balance and fall. Without these people’s support, you lose your focus and cannot go far in life.
Your own backbone could be your parents, spouse, friend, or boss. Whoever your backbone is, do not neglect them so as to avoid losing your support.
Princeton Hines