【鼠目寸光】〖sh mù cùn gung〗[eyes of a rat can see only an inch of light -- short-sighted; A mouse can see only an inch; as short-sighted as mice; can't see beyond one's nose]

鼠肝虫臂挡巨轮，

目瞪口哆碎粉身。

寸指测渊才识浅，

光说不练撼慑心。