A while back I spent some time with a Muslim who, as might be expected, seemed very secure in their faith. Sometimes it can be frustrating because this person seems blinded to the truth, even when they themselves post things that allude to the truth of Christianity.
Thinking about them reminded me of a sermon at church some months ago, part of a series about building bridges between the Church and the lost.
The speaker described the journey to and of faith as being like a line, which he numbered from -5 to +5. The numbers are entirely arbitrary, but the idea is that coming to Christ is represented by crossing 0 (i.e. going from negative to positive).
He used the idea that someone at -5 might be far from God, looking the other way, and probably hostile to the church and religion in general. Someone at +5 might be a mature Christian of many years standing.
Of course the idea of evangelism is to encourage people to cross 0 on the scale, to take the step from not knowing Jesus to knowing him as their saviour. The important thing to remember (which I find very easy to forget!) is that every step someone takes towards that goal is worthwhile.
Not everybody who goes out evangelising is going to see someone cross that line, we won't always be "the one" who leads someone to Christ. But if we talk to someone who is at -5 and when we leave they have moved to -4 we have done something worthwhile. Someone else can then get them to -3, and so on. It can sometimes be discouraging to talk with someone who just doesn't seem to get it, but if we even get them to turn around and look towards God we have accomplished something.
When they finally cross that magic 0 marker it might be because of what someone specific said to them, it might simply be God working in their lives. When I first appeared here in the Christians Answer forum I was probably about -3 or -4 on this scale, and the answers to the questions I got helped push me very near to 0, but I'd say it was a kick from God that got me to cross the line.
Joh 4:37-38 NKJV For in this the saying is true: 'One sows and another reaps.' (38) I sent you to reap that for which you have not labored; others have labored, and you have entered into their labors."