天下

tiān xià land under heaven; the whole world; the whole of China; realm; rule

无

wú not to have; no; none; not; to lack; un-; -less

难

nán difficult (to...); problem; difficulty; difficult; not good

nàn disaster; distress; to scold

事

shì matter; thing; item; work; affair; CL:件[jian4],樁|桩[zhuang1],回[hui2]

， 只怕

zhǐ pà I'm afraid that...; perhaps; maybe; very likely

有心人

yǒu xīn rén resolute person; person with aspirations; people who feel; people who use their heads