Nevermind that it's nowhere in Scripture.
“8But the centurion replied, “Lord, I am not worthy to have you come under my roof, but only say the word, and my servant will be healed. 9For I too am a man under authority, with soldiers under me. And I say to one, ‘Go,’ and he goes, and to another, ‘Come,’ and he comes, and to my servant, ‘Do this,’ and he does it.” 10When Jesus heard this, he marveled and said to those who followed him, “Truly, I tell you, with no one in Israel have I found such faith.” - Matt 8
“9When Jesus heard these things, he marveled at him, and turning to the crowd that followed him, said, “I tell you, not even in Israel have I found such faith.” - Luke 7
Odd, isn’t it. Jesus gave the Centurion faith, and then marveled at its extent! But what Jesus said was “found”, not “given”. I don’t know how anyone can read that passage and conclude that faith is something God provides, rather than a response from inside us.
Mat 8:13 And to the centurion Jesus said, “Go; let it be done for you as you have believed.” And the servant was healed at that very moment.
The error of Calvinism starts with the doctrine of total depravity - that since we are ‘dead’ in our sin, we are unable to respond to the gift of God’s grace. All the other errors flow from this premise, which is not found in scripture. But like the Prodigal Son, we’re ‘dead’ because we are alienated from God. And like him, we can respond to God’s grace - or not.