Abraham believed the Lord, and that was His righteousness (Genesis 15: 6)
Faith to do anything begins and ends with the LORD. Faith rests in an object.
We do not believe in ourselves, but we believe on Jesus!
That is exactly what Abraham did:
"Your father Abraham rejoiced to see my day: and he saw it, and was glad." (John 8: 56)
What did Abraham see, specifically?
Deeper understanding of passages in Genesis will help us understand:
"4Then on the third day Abraham lifted up his eyes, and saw the place afar off." (Genesis 22: 4)
"Afar off" carries implications of something very important that will happen there in the future.
"8And Abraham said, My son, God will provide himself a lamb for a burnt offering: so they went both of them together." (Genesis 22: 8)
"And Abraham lifted up his eyes, and looked, and behold behind him a ram caught in a thicket by his horns: and Abraham went and took the ram, and offered him up for a burnt offering in the stead of his son. 14And Abraham called the name of that place Jehovahjireh: as it is said to this day, In the mount of the LORD it shall be seen." (Genesis 22: 13-14)
Everything that Abraham saw, everything that Abraham was called to do, all of it testified about Jesus, our Provider, Protector, Savior and King.
We even see a picture of Jesus our perfect covering in this verse, as heirs of the promise of everlasting righteousness (Daniel 9: 24) dwelled in tents.
Because of Jesus, we tabernacle in his perfect hope:
"25For David speaketh concerning him, I foresaw the Lord always before my face, for he is on my right hand, that I should not be moved:
26Therefore did my heart rejoice, and my tongue was glad; moreover also my flesh shall rest in hope:" (Acts 2: 25-26)