raise one's sights
Establish higher goals for oneself, as in She seemed content as a paralegal, but we thought she should raise her sights and get a law degree. This idiom uses sights in the sense of "a device on a gun or optical instrument that helps one take aim." [Mid-1900s] For the antonym, see lower one's sights.
Dictionary.com presents 366 FAQs, incorporating some of the frequently asked questions from the past with newer queries.