The only thing that any minister of the gospel can do is share what we believe is the truth with honesty and conviction. We cannot convince anyone to change their mind unless those people see the need for change. The role of the Holy Spirit is to convict people of their need. Our job is to seek truth and share what God reveals to us.
“But the Helper, the Holy Spirit, whom the Father will send in my name, he will teach you all things and bring to your remembrance all that I have said to you.” John 14:26, ESV
“Nevertheless, I tell you the truth: it is to your advantage that I go away, for if I do not go away, the Helper will not come to you. But if I go, I will send him to you. And when he comes, he will convict the world concerning sin and righteousness and judgment:” John 16:7-8, ESV
“Nor do people light a lamp and put it under a basket, but on a stand, and it gives light to all in the house.” Matthew 5:15, ESV