Don’t take on more responsibility than you can handle.
自分が対処できる以上の責任を引き受けないでください。 (jibun ga taisho dekiru ijou no sekinin wo hikiukenai de kudasai)
"Don’t bite off more than you can chew, start small."
"噛める以上のものは食べないで、小さく始めてください。" (kamero ijou no mono wa tabenai de, chiisaku hajimete kudasai)
to achieve something amazing and rare through creativity or...
a feeling of relief after a problem or burden is resolved
to be so surprised that you cannot speak
likely to happen soon
an achievement to be proud of
quiet or calm people often have deep thoughts or emotions