It is because of what Jesus did for us on the cross, that God has given us His Holy Spirit to abide in us. The Holy Spirit’s role is to teach us and guide us “into all truth”. He is also the earnest that seals us so that we can be assured of everlasting life with Jesus. Therefore, because of that, we can be secure in our salvation. Knowing this, we can focus on leading a Holy lifestyle and setting an example for others to follow. We need to stay away from foolish and frivolous arguments. This is not a call to separate ourselves from sinners. We need to associate with them (being careful not to fall into temptations ourselves) and build bridges with them so we can witness to them. We must embrace the value of every human, though, sometimes we will not be able to embrace their values. Seize every opportunity to witness to the unbelievers.
“The Gospel has come to you because it’s on its way to someone else.” -Anonymous