When one door of happiness closes, another opens; but often we look so long at the closed door that we do not see the one which has been opened for us.
⇒ 幸せへの扉は、ひとつが閉じると他が開く。 なのに、人は閉じてしまった扉ばかりに気をとられ、 別の扉が開いていても気づかないことが多いのです。
By Helen Keller