1 trying to hide it makes it more conspicuous (idiom); A cover up only makes matters worse.
历久弥坚
lì jiǔ mí jiān
1 to become more resolute with the passing of time (idiom)
牡丹虽好,终须绿叶扶持
mǔ dan suī hǎo , zhōng xū lu:4 yè fú chí
1 Although the peony is beautiful, it depends entirely on help from the green leaves (idiom). However brilliant you may be, you can't do anything without support from others.
解铃还须系铃人
jiě líng hái xū xì líng rén
1 lit. whoever hung the bell on the tiger's neck must untie it (idiom)