For assuredly He does not give help to angels, but He gives help to the descendant of Abraham.Hebrews 2:16(NASB)
The only part of God's creation that was made in His own image and likeness was the race of man. But when humanity fell due to sin, Christ had to come to earth as a human being so that He might taste death for every man.
The wages of sin is death, but the Son of God set aside His heavenly glory in order to clothe Himself with human flesh and take upon Himself the punishment that we deserve so that by faith in Him we might be forgiven of our sin and returned into the same privileged fellowship with the Father that man enjoyed before the fall - but to do so God had to become man.
Man had been given dominion over God's creation. However, when Adam fell his God-given position as ruler over the earth was relinquished due to his own, foolish disobedience. His authority was transferred into the hands of Satan - a rebellious cherubim - a fallen angel who desired to become like God.
One third of the angels fell along with Satan, but God did not plan to redeem angels. God's redemptive plan was for humanity which required Christ to become a human being. And so He was made a little lower than the angels so that through His suffering and death on behalf of all mankind He might taste death for everyone and bring many sons to glory.
It was the fallen children of Adam that God purposed to redeem "For assuredly," we read "the Lord does not give help to angels, but He gives help to the descendant of Abraham."
Abraham was the man through whom all the families of the earth were to be blessed. His Seed (the Lord Jesus Christ) was to come to earth as mankind's Kinsman-Redeemer and He was to save His people from their sins. He will save Abraham's physical descendants (the Jews) at the end of the Great Tribulation and He saves Abraham's spiritual descendants (the Church) during this post-Cross dispensation of grace.
Abraham was a man who believed God and his faith was credited to him as righteousness - such that all men and women who share 'like-faith' with Abraham are also credited with righteousness and become his descendants.
We are all doomed sinners... fallen creatures deserving of death and yet God sent Christ to atone for our sins. What amazing grace that God should send His only begotten Son into the world to save sinners: "For assuredly, He does not give help to angels, but He gives help to the descendant of Abraham." He does not give help to angels, but He gives help to men who live by faith - and their faith is credited to them as righteousness.
Heavenly Father, what amazing grace to realise that You did not save the angels who sinned but instead You chose to save the sinful race of man. Thank You that Jesus became a Man and was born into this fallen race of disobedient sinners... yet without sin. Thank You that He set aside His heavenly glory and was made a little lower that the angels in order to become like one of us so that by faith in Him, we might be redeemed through His precious blood. Thank You that by faith I have been redeemed. To Him be all praise and glory, in Jesus' name, AMEN.