'Truth' in the Bible

And I am justified in having this confidence about you all, because, both during my imprisonment and when I stand up in defence of the Good News or to confirm its truth, I have you in my heart, sharers as you all are in the same grace as myself.

What then? notwithstanding, every way, whether in pretence, or in truth, Christ is preached; and I therein do rejoice, yea, and will rejoice.

In any case, we should live up to whatever truth we have attained.