There is nothing that more troubles a child of God, than that he fears he shall never hold out. “These weak legs of mine,” he says, “will never carry me to Heaven!” But he is kept by the power of God! Once in Christ–forever in Christ. A believer may fall from some degrees of grace–but not from the state of grace.
“People who long to be rich, fall into temptation and are trapped by many foolish and harmful desires that plunge them into ruin and destruction! For the love of money is at the root of all kinds of evil. And some people, craving money, have wandered from the faith and pierced themselves with many sorrows!” 1 Timothy 6:9-10