Look like the innocent flowerBut be the serpent under it.

What! Wouldst thou have a serpent sting thee twice?

How sharper than a serpent's tooth it is to have a thankless child!

Life is doomed and to cease one day; Not a single soul can choose to stay. Better pave a way for the saints to stroll so that bad old serpent could tempt no more.

Love is a wonderful, terrible thing

At the last it biteth like a serpent, and stingeth like an adder.