Politeness and honour have this advantage, that they remain with him who displays them to others.

[La galantería y la honra tienen esta ventaja, que se quedan: aquélla en quien la usa, ésta en quien la hace.]

Baltasar Gracián y Morales (1601-1658) Spanish Jesuit priest, writer, philosopher

The Art of Worldly Wisdom [Oráculo Manual y Arte de Prudencia], § 118 (1647) [tr. Jacobs (1892)]
    (Source)

(Source (Spanish)). Alternate translations:

Politeness and a sense of honor have this advantage: we bestow them on others without losing a thing.
[tr. Maurer (1992)]

Gallantry, and honor have this advantage, they are saved through being spent, the first if practiced, the second if worn.
[tr. Fischer (1937)]