Literal translation:
* Grâce étonnante: This is the most literal translation, but it doesn't capture the full emotional weight of the original.
More poetic options:
* Grâce merveilleuse: This emphasizes the wonder and awe of the grace.
* Grâce extraordinaire: This highlights the exceptional and extraordinary nature of the grace.
Contextual options:
* La grâce de Dieu: This emphasizes the divine source of the grace.
Ultimately, the best translation will depend on the specific context in which you're using the phrase.