He is as great a fool that laughs at all as he that weeps at all

[Tan necio es el que se ríe de todo como el que se pudre de todo.]

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

The Art of Worldly Wisdom [Oráculo Manual y Arte de Prudencia], § 209 (1647) [tr. Jacobs (1892)]
    (Source)

(Source (Spanish)). Alternate translations:

He is as great a Fool that laughs at all things, as he that vexes at every thing.
[Flesher ed. (1685)]

As great a fool he who laughs at everything, as he who weeps over everything.
[tr. Fischer (1937)]

The person who laughs at everything is just as foolish as the one made wretched by everything.
[tr. Maurer (1992)]