renew

To make (something) new again; to restore to freshness or original condition.

In such a night Medea gather’d the enchanted herbs That did renew old Æson.

To replace (something which has broken etc.); to replenish (something which has been exhausted), to keep up a required supply of.

To make new spiritually; to regenerate.

And fassion not youre selves lyke vnto this worlde: But be ye chaunged in youre shape by the renuynge of youre wittes that ye maye fele what thynge that good yt acceptable and perfaycte will of god is.

For which cause we faint not, but though our outward man perish, yet the inward man is renewed day by day.

To become new, or as new; to revive.

[…] to such as are in fear they strike a great impression, renew many times, and recal such chimeras and terrible fictions into their minds.

But Christianity was a new religious force in Augustine's day. Today, as you say, its power to integrate culture has all but disappeared. Does Christianity still have the capacity to renew?

To begin again; to recommence.

This murder has been a cold case for decades until last year when the new sheriff renewed the investigation.

Then gan he all this storie to renew, And tell the course of his captivitie […]

Synonym of renewal.