I wanted to throw something into this discussion that I think is vital.
I saw that there has been discussion of Eph. 2:8-9, and the nature of grace and faith, so I wanted to write a post about that.
I think Hebrews 11:1 is vital to our understanding of the nature of faith-
"Now faith is the assurance of things hoped for, the conviction of things not seen."
Here's a bit of exposition of the first part of that verse.
In Genesis 15 we see God enter into covenant with Abraham. He promises Abraham (Abram) that his offspring will be numerous and that they will inherit a land of their own to dwell in.
In verse 8 Abraham asks a simple question of God concerning this promise-
"O Lord GOD, how am I to know that I shall possess it?"
As an immediate answer to that question, rather that answer with words, God organizes an elaborate demonstration of His faithfulness to that covenant in a ceremony He Himself performs.
But, this question is explicitly answered with words in the New Testament, i.e.
Hebrews 11:1.
The word faith is only used twice in the Old Testament, so we truly need the New Testament to shed light on the meaning of the word.
Hebrews tells us that faith is the "assurance of things hoped for..."
That word, assurance, is so central to understanding the nature of faith.
We also, just as Abraham, are promised a land to dwell in- the true fulfillment of God's promises to Abraham. Truly it is the promised land. Hebrews 11-13 speaks a great deal of this land being the fulfillment of the O.T. saints' hope.
If we are to ask the question of God, just as Abraham did- "O Lord GOD, how am I to know that I shall possess it?" He would surely answer that question along the lones of Hebrews 11:1- "By faith you shall know, faith is the assurance of this hope."
The epistimology of the word assurance goes something like this.
Assurance means a pledge or guarantee. In times past a deed to a house or piece of land, or a title to a car could have been, or perhaps would have been called, an assurance.
Hence, faith is the title deed (assurance) to our inheritance, and the reason for our hope.
In other words- God gives His promise to all who hear the gospel-
"Repent and believe on the Lord Jesus and you will be saved unto eternal life" (paraphrase).
But this promise is only valid to those who believe (i.e. those appointed to eternal life through Christ).
And how do we know that we are among those that have been appointed to receive this inheritance?- By faith.
God has given us faith, as a gift, to assure us that His promises to us are "yes" and in Christ "amen".
This is not a deed that we could possibly have bought, we are bankrupt in this area, that's where depravity comes in. It is a deed that is given free of charge, no prerequisits. It is the pledge of God given as a gift of, and testimony to His grace and His glory.
Faith is a gift, it is of nothing within ourselves, but must be placed in us by the effectual work of the Holy Spirit through the Word of God.
Grace and peace.