For justice knows few so completely dedicated to her. Many praise her, but not for themselves; others follow her until danger threatens; and then the false deny her, and the political betray her.

[Que tiene pocos finos la entereza. Celébranla muchos, mas no por su casa; síguenla otros hasta el peligro; en él los falsos la niegan, los políticos la dissimulan.]

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

The Art of Worldly Wisdom [Oráculo Manual y Arte de Prudencia], § 29 (1647) [tr. Fischer (1937)]
    (Source)

(Source (Spanish)). Alternate translations:

Sure, [Reason] has not many Adherents. There are many who publish her praises, but will not admit her into their Houses. Others follow her as far as danger will permit; but when they come to that, some like false Friends deny her; and the rest, like Politicians, pretend they know her not.
[Flesher ed. (1685)]

What a scanty following has rectitude! Many praise it indeed, but -- for others. Others follow it till danger threatens; then the false deny it, the politic conceal it.
[tr. Jacobs (1892)]

Few are devoted to righteousness. Many celebrate her, but few visit her. Some follow her until things get dangerous. In danger, the false disown her and politicians cunningly disguise her.
[tr. Maurer (1992)]