道山学海

dào shān xué hǎi

mountain of Dao, sea of learning (idiom); learning is as high as the mountains, as wide as the seas

ars longa, vita brevis

dào

road; path (CL:條|条[tiao2],股[gu3])

shān

mountain; hill (CL:座[zuo4])

xué

to learn

hǎi

ocean