There has always been mystery, or "lack of real understanding" when it comes to the comparison of a simple bird, The Eagle, and CHRISTIANITY. COMMON SENSE shows US the OBVIOUS comparisons.
The Bald Eagle's nest is very large, sometimes as deep as 5-6 feet, wide as 8-9 feet, Some, if not MOST nests are larger! {approximations in size.}
The nest is found where UP-DRAFTS of air are present, such as rocky cliffs, tall tree branches near a long drop to the gound. I live in San Diego CA, USA, where some of the best "hang gliding" is along the cliffs that adjoin the Pacific Ocean. Why? - Because the person runs AT the edge of the cliff, and with the broad wings,(sails,) of his glider,catches the ever present UP-DRAFT of air from those cliffs. Here is where the similarity of The Eagle and The Hang Glider person ends; {except for the 1,000' plus distance to the ground.}
The Eagles, mated for life, raise their eaglets from eggs. The Eaglet is fed by the Mom, (naturally,) through ergurgitation, allowing the small eaglets to grow rapidly. The Bald Eagle is a BIG BIRD! When fully grown the Bald Eagle has a wing span and strength to match its size. It does not "flap"its wings, it SOARS. Spotting a running Rabbit at 2 miles is NOTHING for a grown Eagle! This is no doubt why Isaiah uses the Eagle as an example in verse 40 on. BUT, I digress....
The comparison of The Eagle to Christianity is also common sense. When it is TIME for the Eaglets to learn to fly, or soar, the nest is litterally "stirred up" by Mom and Dad. In the process, AND THE SMALL EAGLETS ARE THROWN OUT TOWARDS THE GROUND! Here is where the Eaglet makes it or in some cases, does not. The Mother and Father Eagles watch the Eaglet drop toward the ground. At the LAST moment, if the Eaglet appears it is not going to spread its wings and fly, the Adult Eagle catches the young bird on its wings and returns the eaglet to the nest. This is done over and over until the Eaglet learns to fly, or not, the ground becoming its demise.
God sent his ONLY SON as a sacrifice for our sin {before, during and after,} to die on the rough hewn cross. There was NO SECOND CHANCE for Jesus. The COMPARISON BETWEEN THE EAGLE AND GOD'S PLAN FOR US IS; God saves us from death in The lake of fire, Hades, eternal damnation, by giving us the opportunity to CONFESS OUR SIN thereby, like the Adult Eagle, SAVING US FROM A HORRIBLE DEATH by catching us on HIS wings of forgiveness.
SIMPLE.
Read Isaiah 40: 28-40 -