「一理通百理明」

(pos:語句)
<explanation>
yue:識咗個道理之後，就會明白晒所有嘢
eng:one will understand everything (in a particular field) by understanding the underlying principle; literally: understanding one idea makes a hundred ideas comprehensible
<eg>
yue:雖然話一理通百理明，但係啲基本資料如果唔熟，都係做唔到嘢㗎。 (seoi1 jin4 waa6 jat1 lei5 tung1 baak3 lei5 ming4, daan6 hai6 di1 gei1 bun2 zi1 liu2 jyu4 gwo2 m4 suk6, dou1 hai6 zou6 m4 dou2 je5 gaa3.)
eng:While getting the underlying principle right will make learning much easier, it simply isn't practical unless you memorize the basic facts.