You will encounter those whose hearts are so hard that no matter how eloquent and convincing your words are, they won't hear you. You can tell them about your experiences, give many examples of how much Jesus loves them, share the peace you have because of Him, but your words will fall on deaf ears. Jesus knew you would encounter people like this and gave us the example of the rich man, who ended up in Hell, and Lazarus, who was poor and lame his entire life but was now receiving comfort in Heaven. The rich man begged Abraham to send Lazarus back from the dead to tell his brothers about the torment he was experiencing in Hades. Abraham reminded him that even a man back from the dead would not convince them. Those people will receive all that they are going to get right here on this earth. Just know, we are sent out to tell everyone, even those that who will never allow the truth to penetrate their hearts.
He said to him, 'If they do not hear Moses and the Prophets, neither will they be convinced if someone should rise from the dead.'" Luke 16:31