I truly wish with all my heart that universal salvation were true. But to pretend that people are not sinful and in need of salvation would be as cru… - William Lane Craig

More often than not, it is what you are rather than what you say that will bring an unbeliever to Christ.
This, then, is the ultimate apologetic. For the ultimate apologetic is: your life.

The man who claims to have no need of philosophy is the one most apt to be fooled by it.

Doubt is never simply an intellectual problem. There is always a spiritual dimension to doubt, as well. There is an enemy of your souls, Satan, who hates you intensely and is bent on your destruction and who will do everything in his power to see that your faith is destroyed. And therefore when we have these intellectual doubts and problems we should never look at them as something that is spiritually neutral or divorce them from the spiritual conflict that we are involved in. Rather we need to take these doubts to God in prayer, to admit them honestly, to talk to our Christian friends about them, to not stuff them or hide them, we need to deal with them openly and honestly and talk to people about them and seek God's help in dealing with them.