Amen and thank you Lord!
Ok...then lets consider that these people was walking in their own will...and God convicted them that they where in sin (contrary to His Will) They confessed with their tongue and bowed their knee to His Will. This my brothers is not "free-will" it is "surrendered" will, that saves us all...
So does the principle of receiving Gods grace change now that we are "saved"?...no it continues in that God gives grace to the humble and obedience is a continued process of surrender of ones own will, that the Spirit of God might work Gods Will in us. Fear and trembling is that place where we have no confidence in our own strength or our own ability or will.
read these scriptures carefully and one can see that our salvation is a continued surrender, just as it was when we first humbled our self and came OUT of our own will.
Php 2:10
That at the name of Jesus every knee should bow, of things in heaven, and things in earth, and things under the earth;
11 And that every tongue should confess that Jesus Christ is Lord, to the glory of God the Father.
12 ¶ Wherefore, my beloved, as ye have always obeyed, not as in my presence only, but now much more in my absence,
work out your own salvation with fear and trembling.
13
For it is God which worketh in you both to will and to do of his good pleasure