胸怀大志 [- - dà zhì]aim high; a person with great ambitions; cherish high aspirations; cherish lofty designs in one's bosom; entertain great ambitions; in one's mind; keep high aspirations [exalted ambition] at heart:
•¶胸怀大志， 腹具良谋 cherish lofty designs in one's bosom and have plans to achieve them