The Eagle:

The eagle is present across a range of beliefs or philosophies:

The Eagle represents spiritual protection, carries prayers, and brings strength, courage, wisdom, illumination of spirit, healing, creation, and knowledge of magic. The eagle has an ability to see hidden spiritual truths, rising above the material to see the spiritual. The eagle has an ability to see the overall pattern, and the connection to spirit guides and teachers. The eagle represents great power and balance, dignity with grace, a connection with higher truths, intuition and a creative spirit grace achieved through knowledge and hard work.

The dictionary of scripture and myth, describes the eagle as:

A symbol of the holy spirit, which flies, as it were, through the mind (air) from the higher nature (heaven) to the lower nature (earth) and soars aloft to the self (sun).

In ancient Egypt and Babel the eagle was:

The symbol of the noon sun, which signified the Great Spirit.

A sermon written by T. Rhonda Williams explores the tradition within the English church of placing the bible on the outstretched wings of an eagle, and concludes;

In sacred symbolism the eagle stands for that power of rising above the earth, above the physical and the literal, into the heavens of rarefied faith, a mystic intuition, and a penetrating spiritual intuition.

Source:  http://www.eaglespiritministry.com