Looks like faith must also have grace.
Faith alone is a myth.
Which is why justification is by grace alone, through faith alone, in Christ alone. When someone simply says "by faith alone," they are referring to the full meaning. So, that is your misunderstanding. Both "grace alone" and "faith alone" oppose the unbiblical, false gospel idea of justification by works.
Justification is solely an act of God, a free gift of his grace, to be received by faith. No works are required for our justification.
Therefore faith alone and grace alone are man made terms designed to prop up a man made doctrine of deceit.
"Man-made terms" to describe exactly what we see in Scripture. If you oppose justification by grace alone through faith alone, your only option is the false gospel of justification by works--
that is the doctrine of deceit. That justification is by grace alone, through faith alone, in Christ alone is basic Christianity and a central tenet of the faith.
Numerous passages attest to this. Here are just a few:
Act 15:8 And God, who knows the heart, bore witness to them, by giving them the Holy Spirit just as he did to us,
Act 15:9 and
he made no distinction between us and them, having cleansed their hearts by faith. (ESV)
Rom 3:21 But now the righteousness of God has been manifested apart from the law, although the Law and the Prophets bear witness to it—
Rom 3:22
the righteousness of God through faith in Jesus Christ for all who believe. For there is no distinction:
Rom 3:23 for all have sinned and fall short of the glory of God,
Rom 3:24
and are justified by his grace as a gift, through the redemption that is in Christ Jesus,
Rom 3:25 whom God put forward as a propitiation by his blood,
to be received by faith. This was to show God's righteousness, because in his divine forbearance he had passed over former sins.
Rom 3:26 It was to show his righteousness at the present time, so
that he might be just and the justifier of the one who has faith in Jesus.
Rom 3:27 Then what becomes of our boasting? It is excluded. By what kind of law? By a law of works? No,
but by the law of faith.
Rom 3:28
For we hold that one is justified by faith apart from works of the law.
Rom 3:29 Or is God the God of Jews only? Is he not the God of Gentiles also? Yes, of Gentiles also,
Rom 3:30 since God is one—
who will justify the circumcised by faith and the uncircumcised through faith. (ESV)
Tit 3:4 But when the goodness and loving kindness of God our Savior appeared,
Tit 3:5 he saved us,
not because of works done by us in righteousness,
but according to his own mercy, by the washing of regeneration and renewal of the Holy Spirit,
Tit 3:6 whom he poured out on us richly through Jesus Christ our Savior,
Tit 3:7 so that
being justified by his grace we might become heirs according to the hope of eternal life.
Tit 3:8 The saying is trustworthy, and I want you to insist on these things, so that
those who have believed in God may be careful to devote themselves to good works. These things are excellent and profitable for people. (ESV)
