piety

n. 虔诚

The old man has great piety towards God.

这位老人对上帝非常虔诚。

Often a convert is zealous not through piety, but because of the novelty of his experience.

改变信仰者之所以常常显得热情，并非出自虔诚，而是由于他的体验新鲜之故。