Fidelity is the sister of justice.

We're really asking the public's help in bringing this individual to justice.

Prosperity asks for fidelity; adversity exacts it. [Lat., Poscunt fidem secunda, at adversa exigunt.]

Fidelity bought with money is overcome by money. [Lat., Pretio parata vincitur pretio fides.]

Be not the first by whom the new are tried, Nor yet the last to lay the old aside.

So spake the seraph Abdiel, faithful found, Among the faithless faithful only he.