We know how the story ends. . .here on earth at least and if we believe in the Lord Jesus Christ we will have a wonderful forever. . . .
“You will be hated by everyone because of me, but the one who stands firm to the end will be saved.” Matthew 10:22
I would warn, however, against resting on any kind of “cultural Christianity” — even an old fashioned kind.
The more spiritually versed a Christian gets, the more he or she knows he or she has to go right to Jesus, and no amount of civic piety can take the place of this. The civic piety may be a side effect and serve as a witness, but it can’t ever be a source of Christian virtue of itself. Only Jesus can do that.
When even fundamentalism gets THAT fundamental... God will guaran-blessed-tee ya that showers of blessing and rivers of righteousness will flow.
And when the unbeliever starts complaining, not even about the creches and the Christmas lights, but “Jesus this, Jesus that, what a bleeping nuisance you are about Jesus!” then we know we have presented the right kind of witness.