They do not ill, being lords of ours, to slay
Me; nay, they could not spare: but thee to slay,
To spill thy strong young life for truth to me,
In all men's eyes would mark them monstrous : thou
Must live, and serve my slayers, and serving them
Sustain my memory by the proof — if God
Shall give thee grace to prove it — that thy name,
Thy father's name and mine, in true men's ears
Rings truth, and means not treason.

Faliero, Act V. Sc. 3. - Marino Faliero (1885)