it's better not to
Hay cosas que es mejor no saber.
There are things that are better not to know.
— Sueño de fuga (1994)
It’s better not to go there.
Entonces empezamos las lecciones, de las que es mejor no hablar demasiado.
Then we start the lessons, which are best not talked about too much.
Es mejor no esperar para no perder la idea.
It is better not to wait, so as not to lose the idea.
— Taxi (1998)
Sometimes it's better not to know.
It’s better not to talk so much.
Tom piensa que es mejor no prestarle nada de dinero a Mary.
Tom thinks it’s better not to lend Mary any money.