Why is it so difficult for believers to be faithful to Jesus' commission? One of the most significant reasons is a lack of authentic relationships with those who are not yet believers. Peter believed that God was a God Who shows 'partiality' (Acts 10:34) and was 'amazed' (10:45) that God would impart His Holy Spirit to these Gentiles.
His struggle was also one of association with an uncircumcised Gentile (10:28)...a similar struggle believers have today. It took multiple visions to force the situation. Yet, in the passage, Cornelius is described as devout, a God-fearer, someone who regularly prays, righteous, and well-spoken of by the Jews. Of all the unclean Gentiles, this man would have been the 'cleanest of the unclean'!
Today, we fail to associate with unbelievers who we perceive to be unclean and, as a consequence, do not pursue cultivating authentic relationships. What if the Lord asked you to develop a relationship with someone not righteous, not spoken well of, not a God-fearer, and not devout? He has!
Who is your 'Cornelius'? With whom will you cultivate an authentic relationship? How will you plant truth in that relationship? Ask the Lord to direct you to that relationship and then stand back and be amazed!