1f056552__Unequally_Yoked_to_the_World____in__the_world__not_yoked_
[Example] Goals [“of” the world (yoked)] Having those goals for the wrong reason; wanting a nicer home to show off how “successful” you are, or being a good golfer to the extent it monopolizes your time for God and family you could be unequally yoked to a worldly goal that causes your Christian walk to suffer or keeps you from growing spiritually [“in” the world (not yoked)] 
Having a goal that is not specifically “Christian” such as owning a nicer home or being a good golfer
Brent Riggs - Designer, Author, Business Man - Question: What Does It Mean to Be Unequally Yoked to the World?
“in” the world (not yoked)