From The Druid Animal Oracle by Phillip and Stephanie Carr-Gomm

Bird of both the gateway and the forge. Blackbird calls to us from the gateway between two worlds, urging us to follow a spiritual path or to become more self-aware. he calls to us in the twilight, showing us the path to Otherworldly secrets, pointing out the ways in which we can discover more about our hidden motivations and potential. There are times in life when it is important to concentrate on the outer world and your responsibilities in that world, but there are also times when you must attend to the haunting song of your soul which calls you to a study of spiritual truths, and to an exploration of the inner world through dreams and myths. In heeding Blackbird's song, you will discover healing and new depths in your soul.

Contrary it reminds you that the blackbird is the smith's bird, and his song may be calling you to work in the forge of your own heart--to create a life of passion and purpose. all four elements are used in metal-working, and to create a healthy and balanced life we must work with the power of the four elements, integrating and developing our minds and hearts, our instinct and our intuition. Just standing at the gateway between two worlds, without truly working in either, is a denial of our own power and responsibility.