out of sight, out of mind That which cannot be seen or is not noticeable will be forgotten. 看不见的东西，久而久之就会忘掉 Although she is my best friend in the past, I seldom contact with her nowadays. Out of sight, out of mind. 尽管她以前是我最好的朋友，但是现在却很少跟她联系。眼不见