When I was a youngster, I wasn't a Christian. But at school - a state school, let me say - we were marched into the school hall each day to stand in line, hands together, for morning prayers.
I clearly remember standing there one day - I would be about eight - thinking "If God made everything, who made God?" The question, of course, is a nonsense. Nobody made God. But at least we were brought up to be aware of God's existence.
Now some children are brought up without a mention of God. People actively engaged in evangelism say it was once possible to start with the story of Jesus. Now they have to go further back, and start with the existence of God.
Not that people can escape it. There is deep down in every person an awareness of God. They can ignore it; they can squash it; they can deny it. But they can't escape it.
"What may be known of God is manifest in them," says Paul in Romans, "for God has shown it to them. For since the creation of the world his invisible attributes are clearly seen, being understood by the things that are made, even his eternal power and Godhead, so that they are without excuse."
No matter how involved people get in the things of this life, thoughts about God's existence keep pushing up, like grass through asphalt.
There are three questions we all ask ourselves, sooner or later. They are
Where did I come from?
What am I doing here?
Where am I going?
Could any questions be more important than these?