The place in the Bible where it says a Christian must admonish his Brother

We live in a world that increasingly strives to (supposedly) promote the idea of tolerance, but actually becomes intolerant of Christian absolutes as it does so. Whether it involves religion, behavior, or human sexuality, there is a growing anti-Christian sentiment in America and other Western nations. Ultimately, built into this “tolerance” is the concept that truth is determined by each individual, not by God. This has led many people to conclude that making judgments on anyone (especially coming from Christians) is wrong because the Bible says ”judge not” (Matthew 7:1). Interestingly enough, those who reject the notion of God or the credibility of the Bible often attempt to use God’s Word (e.g., by quoting verses out of context) to excuse their actions when they are presented with the gospel and the plight of sinners for rejecting it.