No hay más ciego que el que no quiere ver

[ROBINDESBOIS]

Is there a saying for this one in English?

[Perikles]

There's none so blind as he who will not see.

(note: will in this case is in the sense of want, it is not a future tense. This expression is used because it is much nicer than he who does not want to see).

[pjt33]

Es igual. There's no-one blinder than the person who doesn't want to see.

[Perikles]

Es igual. There's no-one blinder than the person who doesn't want to see.I was just trying to be a bit poetic. :rolleyes:

Internet:

There are none so blind as those who will not see. The most deluded people are those who choose to ignore what they already know. The proverb has been traced back in English to 1546 (John Heywood), and resembles the Biblical verse quoted