The way to quiet the turbulence of a mob is to withdraw your hand, and let it quiet itself; to concede today, may be the best way to succeed tomorrow.

[Sea modo de sosegar vulgares torbellinos el alzar mano y dejar sosegar; ceder al tiempo ahora será vencer después.]

Baltasar Gracián y Morales (1601-1658) Spanish Jesuit priest, writer, philosopher
The Art of Worldly Wisdom [Oráculo Manual y Arte de Prudencia], § 138 (1647) [tr. Fischer (1937)]
    (Source)

(Source (Spanish)). Alternate translations:

The way then to calm popular gusts, is to be quiet. Then to yield to the times, will get the victory afterwards.
[Flesher ed. (1685)]

The way to still storms in great multitudes is to hold one's hand and let them go down of themselves. A timely giving way for the present assures victory later.
[tr. Duff (1877)]

The proper way to still the storms of the vulgar is to hold your hand and let them calm down of themselves. To give way now is to conquer by and by.
[tr. Jacobs (1892)]

Throwing up your hands is sometimes a good way to put down vulgar storms. If you bow to time for the present, you will conquer in the future.
[tr. Maurer (1992)]