هر چه زود برآيد، دير نپايد». اين سخن حاوي چنين نكته‌اي است كه هر كاري كه مي‌بايد به كمال و رسايي برسد، نيازمند شكيبايي و صبر است. با تمرين و تجربه است كه صفتي والا به دست مي‌آيد.
As you see the proverb means that whatever appears first and very soon does not last. patience, effort and practice are required in order to reach perfection .

Dear simon, your dictionary is in fact quite close to the essence of what the term بر امدنin this context stands for