Even if we believe that the laws of physics in principle determine the evolution of some particular state of the universe with perfect fidelity, we don't know what that state is, and in the real world the increase of entropy is consistent with any number of possible futures. (discovermagazine.com)
T itus 2:9 - 10,15 (NRSV) Tell slaves to be submissive to their masters and to give satisfaction in every respect; they are not to talk back, not to pilfer, but to show complete and perfect fidelity, so that in everything they may be an ornament to the doctrine of God our Savior. (religion.blogs.cnn.com)
As married people our efforts are drawn into the perfect fidelity Christ has to the Church (cf. CCC n. 2365). (faith.org.uk)