There is a bit of reassurance I would like to offer any one who reads this. Sometimes I hear Christians saying they feel inadequate because they do not make more difference to the people around them. They do not cause all their friends and acquaintances to know Jesus Christ. I've felt it myself. But then, there's another angle that might be worth seeing, too. They might be doing more good than they know.
I recall being a non-Christian. Just before my 25th birthday was when I made the decision to give my life to Jesus Christ and take Him as saviour. I can remember the moment. And when that happened it was the end of a long slow process, in which numerous Christians had a part.
My mother took us to church when we were young, and we had scripture lessons at school. So I knew something about Christianity, basically who God and Jesus were, and Mary and Joseph and John the Baptist.
When I was at school and more at university I had conversations with Christians in which they ran past me what the critical things in Christianity were. Even before I was a Christian myself I could see, Christians had a reassurance that the rest of the world did not have. They believed that God made things come out right, no matter what. They were not alone or at the mercy of chance.
There was something else, too. In general, Christians were less likely to be spiteful or unpleasant in the way they treated you. Sometimes they were ridiculed as 'goody-goodies' by others, but in a general way you felt safe round them.
It all added up. Finally, I had a Christian flatmate. He made a difference.
The point is, it was a gradual process. Several small steps. And some of the people who were part of it did not see the outcome. When I was 20 I had a conversation with a warm and kind hearted Christian girl who explained convincingly why just being basically 'good' in a human sense was not the way of being saved. It took the sacrifice of the Lamb of God, to spare humans the punishment they had incurred. That girl might never know in this world that she made a difference. What she said and how she said it served in part to evangelize me.
Remember what Paul the Apostle said. One plants, one waters and God brings the increase. You might not see the outcome but the seeds you plant might grow. It is important not to lose heart.