reach for the stars

US /riːtʃ fɔːr ðə stɑːrz/
UK /riːtʃ fɔːr ðə stɑːrz/
"reach for the stars" picture
1.

to aim high or to have ambitious goals

:
She always told her children to reach for the stars and never give up on their dreams.
It's good to reach for the stars, but also be realistic about what you can achieve.