Psalm 119 is such a rich Psalm. If you read it straight from beginning to end it seems to get repetitive but each section is broken out by a specific Hebrew letter. Each letter is associated with words or concepts beginning with that letter.
This particular section relates strongly to our topic... 'The Finished Work of Christ':
Forever, O LORD, your word is firmly fixed in the heavens.
Your faithfulness endures to all generations; you have established the earth, and it stands fast.
By your appointment they stand this day, for all things are your servants.
If your law had not been my delight, I would have perished in my affliction.
I will never forget your precepts, for by them you have given me life.
I am yours; save me, for I have sought your precepts.
The wicked lie in wait to destroy me, but I consider your testimonies.
I have seen a limit to all perfection, but your commandment is exceedingly broad." Psalms 119:89-96 ESV
God's word is forever settled in Heaven. It remains vigilant and ready there in it's correct place forever. God's faithfulness also stands and is expressed in every generation.
What Christ has done covers all of humanity. Our perception of what Christ has done has a preserving power on our mind. God does the keeping. The precepts of God become building blocks for our thinks but they are all nestled under the covering of the big picture.
The last verse is especially telling. Here is a breakdown of the Hebrew.
"I have seen an end of all perfection: but thy commandment is exceeding broad." Psalms 119:96 KJV
Seen - Ra'ah (Strong's H7200) - To observe, watch or perceive
End - Qets (H7093) - Cut off point
All Perfection - Tiklah (H8502) - Perfect completion or fulfillment, to be consumed fully as by fire
Commandment - mitsvah (H4687) - Blessed participation
Exceeding - Me'od (H3966) - much, many, abundant force
Broad - Rachab (H7342) - Wide, like the freedom of an open field
If we have consciously observed the work of the cross then we have seen the end of perfection. Sin has been utterly consumed as if by fire and open before us is a broad place of freedom.
The letter LAMED is linked to learning or instruction and the fullness of a people group. God clearly links teaching and understanding to the eternal nature of His word and the finished state of His work. Holy ideas are always resting on the immovable, everlasting and complete. These are not theories they are finished facts.
Hope can't be a theory. Theories have room for doubt. Hope must be based on something proven.
The cross has given us something proven and lasting. We have seen the end of all perfection.