Truth is relative, and the best truth of our own is worth testing under various conditions and circumstances.

The truth or falsehood which is not our own has a right to say the best for itself that can be said.

Let truth and falsehood grapple.

Let us hear the counter-truth or the rival falsehood which is the complement or the criticism of our own, and hear it stated with the utmost skill.

A Luther would surely be the wiser for an evening spent in company with a Blougram; and Blougram has things to tell us which Luther never knew.
But precisely because truth is relative we must finally adhere to our own perceptions; they constitute the light for us; and the justice we would do to others we must also render to ourselves.