Calvinists often quote Romans 8:7-8 as proof that mankind in unable to trust in Christ, even after being confronted by the gracious Holy Spirit wrought gospel truth. But, by allowing scripture to interpret scripture we can see this is NOT the case. First, this text doesn't even mention the gospel, so there is no ground on which to claim that the gospel is insufficient to enable a lost man to respond. Second, observe: “You are not in the flesh but in the Spirit, if indeed the Spirit of God dwell-s in you,” Paul declares (Rom. 8:9a). So, to be 'in the Spirit,' the Spirit of God must dwell in us. How does that come to pass? 13 And you also were included in Christ when you heard the word of truth, the gospel of your salvation. Having believed, you were marked in him with a seal, the promised Holy Spirit, 14 who is a deposit guaranteeing our inheritance until the redemption of those who are God's possession--to the praise of his glory. Eph. 1 Clearly, the indwelling of the Holy Spirit comes 'when you hear the gospel...having believed.' So, one moves from being 'in the flesh' to being 'in the Spirit,' by hearing the gospel and believing it.