Definice a Význam "there are none so blind as those that will not see"

What is the origin of the proverb "there are none so blind as those that will not see" and when to use it?

The proverb "there are none so blind as those that will not see" has its origins in English-speaking cultures, with roots in the 16th century and appearing in works by writers such as John Heywood. The saying highlights the idea that rejecting what is obvious or known to others can be more limiting than actual blindness. It serves as a reminder that being open to the truth and willing to see beyond personal bias or discomfort is essential for understanding and growth.