Jesus’ Admonition in Matthew 7

When we are considering sharing our faith with others, we should be very careful and discerning, as Jesus taught us in the Sermon on the Mount when He said: “Do not give what is holy to dogs, and do not throw your pearls before swine, or they will trample them under their feet, and turn and tear you to pieces.” (Matthew 7:6).
To be obedient to our Lord’s command here, we are going to have to make some assessments as to where the “dogs” and “swine” are, and where they are not. We should not approach just anyone to share our faith, because if we do we may be approaching one of those whom Jesus referred to as dogs or swine, and they may indeed “turn and tear us to pieces”.
Instead, let us look for an open door of opportunity to share our faith as God provides such opportunities.
As we have discussed before, and as we should understand when sharing our faith, the Bible teaches that God has mercy on some, and the rest He hardens (Romans 9:18).
Unregenerate man does not have the capacity or ability to receive the Gospel message unless it has been granted to Him by God to do so. The ones to whom God shows mercy are called to faith in Christ and receive the Gospel message. One of the evidences of their calling by God is that they will believe in Christ. Other evidence is that they will have a genuine love for other believers which will be demonstrated by their actions. The others, whom the Scripture says that God hardens, are left in their sins and have no hope of understanding or receiving the Gospel message (Matthew 13:11, John 8:42-47, 10:22-26).