He who digs a pit for others,falls in himself.

Heroes are attracted to heroes.

A grain of millet

in adverse circumstances

A farewell to arms

Intestinal distress

convert sorrow into strength(turn grief into strength)

A man is never too old to learn.(Live and learn)

A gentleman doesn't fight women.

Profound learning is an accumulation of bits of knowledge.

be in a constant state of anxiety

do something to offend the powerful

be the biggest joke in the world(How ridiculous!)

keep as clear of somebody as river water and well water

turn bad into good

get no thanks for one's good intentions

turn hostility into friendship(bury the hatchet)

Sea water is immeasurable.

unending anxiety

Eagles do not breed doves.(An eagle does not hatch a dove.)