Salvation is by faith. If I get it by faith then it is kept by faith. But what happens when I develop a heart of faithlessness?
MADE VOID OR CANCELED OUT THE FAITH:
Romans 4:13-16 ESV For the promise to Abraham and his offspring that he would be heir of the world did not come through the law but through the righteousness of faith. (14) For if it is the adherents of the law who are to be the heirs, faith is null and the promise is void. (15) For the law brings wrath, but where there is no law there is no transgression. (16) That is why it depends on faith, in order that the promise may rest on grace and be guaranteed to all his offspring—not only to the adherent of the law but also to the one who shares the faith of Abraham, who is the father of us all.
In verse 14 the Greek “to make null or void” means to make empty, abase, neutralize, falsify, or cause faith to be in vain.
We will see that we are not boast that we were grafted in to the branch because we were grafted in by faith, and if we no longer walk in faith then we will be cut off.
Romans 11:17-22 ESV But if some of the branches were broken off, and you, although a wild olive shoot, were grafted in among the others and now share in the nourishing root of the olive tree, (18) do not be arrogant toward the branches. If you are, remember it is not you who support the root, but the root that supports you. (19) Then you will say, “Branches were broken off so that I might be grafted in.” (20) That is true. They were broken off because of their unbelief, but you stand fast through faith. So do not become proud, but fear. (21) For if God did not spare the natural branches, neither will he spare you. (22) Note then the kindness and the severity of God: severity toward those who have fallen, but God's kindness to you, provided you continue in his kindness. Otherwise you too will be cut off.
Charles Morris. Founder and Senior Pastor of RSIM USA.