Robert Christy, comp. Proverbs, Maxims and Phrases of All Ages. 1887.

Robbing

He that is robbed not wanting what is stolen,
Let him not know it, and he’s not robbed at all.Shakespeare.

To rob a robber is not robbing.French.

To steal for pence is dastardly and mean;
To rob for millions with a soul serene,
Soils not the fingers; all such is clean.