Distrust all those who love you extremely upon a very slight acquaintance and without any visible reason.
- Chesterfield, Lord

It is double pleasure to deceive the deceiver.
- La Fontaine, Jean

One who deceives will always find those who allow themselves to be deceived.
- Machiavelli, Niccolo

Mary, I believed thee true, And I was blest in thus believing; But now I mourn that ever I knew A girl so fair and so deceiving.
- Moore, Thomas

O, what a tangled web we weave when first we practise to deceive!
- Scott, Sir Walter