Written by Ray Stedman (1917-1992), an American pastor and author.
We are not the ones who do the soul winning, ever. We do not have the power to convince people to become Christians, nor is a person won to Christ by our trying to argue with them. This means we can relax in our approach, and if the Holy Spirit has not already prepared a heart and made them ready and willing to listen, there is nothing we can do to make them so, except to pray for them.
But the Advocate, the Holy Spirit, whom the Father will send in my name, will teach you all things and will remind you of everything I have said to you. [John 14:26]