What does it mean to aim high?

aim for the highest?

Athena Chu Spring gā o yu m: n

Small seal calligraphy: lofty aspirations

Pursue lofty ideals, professional ambitions, etc. There is also the artistic conception of "Let's go straight to my Yun Fan and bridge the deep and deep sea".

Allusions should aim high, admire sages, abandon lust, abandon stagnation, and make ordinary people's ambitions stand out and feel sad. Endure flexion and extension, cut into pieces, ask questions extensively, and avoid being stingy; Although I have stayed for a long time, why harm the beauty? Why bother? ("The Three Kingdoms Zhuge Liang Mian Yu Shu")

Basic explanation: it means ambitious, ambitious.

aim for the highest?

Another word: lofty: brilliant and far-reaching ambition.