One of the mysteries of the English language finally explained.
A mind that is accessible or receptive, especially to new arguments or ideas; a candid or honest mind. Also (especially in later use): an unprejudiced mind. Frequently in "to keep an open mind" and variants: to be ready to consider a matter without prejudice.
Mid 18th century; earliest use found in Mark Akenside (1721–1770), poet and physician. From open + mind.
open mind/ˌəʊp(ə)n ˈmʌɪnd/
In this article we explore how to impress employers with a spot-on CV.