'Principle' in the Bible

for righteousness of God is revealed therein, on the principle of faith, to faith: according as it is written, But the just shall live by faith.

since indeed it is one God who shall justify the circumcision on the principle of faith, and uncircumcision by faith.

For if Abraham has been justified on the principle of works, he has whereof to boast: but not before God;

Therefore it is on the principle of faith, that it might be according to grace, in order to the promise being sure to all the seed, not to that only which is of the law, but to that also which is of Abraham's faith, who is father of us all,

Therefore having been justified on the principle of faith, we have peace towards God through our Lord Jesus Christ;

What then shall we say? That they of the nations, who did not follow after righteousness, have attained righteousness, but the righteousness that is on the principle of faith.

Wherefore? Because it was not on the principle of faith, but as of works. They have stumbled at the stumblingstone,