Camarón que se duerme, se lo lleva la corriente.

“The shrimp that falls asleep is carried away by the current.”

Those who fail to stay alert and act will be overtaken by events or lose their opportunity.

Al que madruga, Dios lo ayuda.

“God helps the one who rises early.”

Diligence and an early start are rewarded; effort invites good fortune.

A caballo regalado no se le mira el diente.

“Don't look a gift horse in the mouth.”

Do not criticize or question the value of something given to you freely.

Más vale tarde que nunca.

“Better late than never.”

Doing something after a delay is still preferable to never doing it.

No hay mal que por bien no venga.

“There is no bad from which good does not come.”

Even misfortune can eventually lead to a positive outcome.

Perro que ladra no muerde.

“A dog that barks does not bite.”

Loud threats often come from those least likely to actually cause harm.