"It means singleness, like marriage, has a unique way of testifying to the gospel of grace. Jesus said there will be no marriage in the new creation. In that respect we’ll be like the angels, neither marrying nor being given in marriage (Matt. 22:30). We will have the reality; we will no longer need the signpost.
By foregoing marriage now, singleness is a way of both anticipating this reality and testifying to its goodness. It’s a way of saying this future reality is so certain that we can live according to it now. If marriage shows us the shape of the gospel, singleness shows us its sufficiency. It’s a way of declaring to a world obsessed with sexual and romantic intimacy that these things are not ultimate, and that in Christ we possess what is."