Good friends remain loyal in good times and in bad times.
Explanation:
Sir Andrew's subplot theme in Acts II and III of Twelfth Night is "Good friends remain loyal in good times and bad times.
Good friends watch each others back and never betray themselves. Good friends love and care for each other, thy don't snitch on themselves and are honest, truthful and kind to each other.
Sir Andrew and Sir Toby exhibit the quality of loyal friends in the Twelfth Night.
Boiling point. Distillation is the process of removing one substance from another by boiling it away. This is possible because of differences in boiling points of two substances.