身在福中不知福.Take it for granted.
或者：“身在福中不知福”（The worth of a thing is best known by the want of it.）
如例句：You should appreciate the fact that you have parents who love you.Don’t take it for granted.你必须感激你父母对你的爱,不要身在福中不知福.
也是英语谚语了：
如：
愚人总是身在福中不知福（Fools never know when they are well off.）
俗语：井枯方知水重要.身在福中不知福.