This is from William Shakespeare “As you Like it”, Act III, scene iii.
=> 糖本身就是甜的, 加上蜂蜜只是使它更甜而已
Audrey: Would you not have me honest?
Touchstone: No, truly, unless thou wert hard- favoured; for honesty coupled to beauty is to have honey a sauce to sugar.
What Touchstone said was that unless you were ugly, honesty and beauty together in one woman is like sweetening sugar with honey.