It is not possible to be incidentally a Christian. The fact of Christianity must be overwhelmingly first or nothing.

Whatever one of us asked the other to do - it was assumed the asker would weigh all the consequences - the other would do. Thus one might wake the other in the night and ask for a cup of water; and the other would peacefully (and sleepily) fetch it. We, in fact, defined courtesy as 'a cup of water in the night'. And we considered it a very great courtesy to ask for the cup as well as to fetch it.

God gives us many gifts, but never permanence; that we must seek in his arms.

…though I wouldn’t have admitted it, even to myself, I didn’t want God aboard. He was too heavy. I wanted Him approving from a considerable distance. I didn’t want to be thinking of Him. I wanted to be free—like Gypsy. I wanted life itself, the color and fire and loveliness of life. And Christ now and then, like a loved poem I could read when I wanted to. I didn’t want us to be swallowed up in God. I wanted holidays from the school of Christ.

It is not possible to be 'incidentally a Christian.' The fact of Christianity must be overwhelmingly first or nothing. This suggests a reason for the dislike of Christians by nominal or non-Christians: their lives contain no overwhelming first but many balances.

...So Englishmen saw it. Lincoln's insincerity was regarded as proven by two things: his earlier denial of any lawful right or wish to free the slaves; and, especially, his not freeing the slaves in 'loyal' Kentucky and other United States areas or even in Confederate areas occupied by United States troops, such as New Orleans.

A man in the jungle at night, as someone said, may suppose a hyena's growl to be a lion's; but when he hears the lion's growl, he knows damn well it's a lion.