How far did they arrive at lofty and immutable principles of morality?

In God, as their original, are the immutable principles of reality and cognizance.

Identifying ourselves with immortal and immutable principles, we share both their immortality and immutability.

And has poetry no end, no eternal and immutable principles?

Governments are based on expediencies and changing circumstances, not on immutable principles or divine rights.

Fenianism is a power founded upon the immutable principles of truth and justice; and is, therefore, indestructible.

And this generation went back, powerfully aided by the words of du Picq, to that older tradition, to the immutable principles of war.

His great object was the elucidation of morals; and he was the first to teach ethics systematically from the immutable principles of moral obligation.

"Only crackpots would seek to outwit the immutable principles of economics".