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It is easier to become entangled with an enemy than to disentangle oneself afterwards. – Aesop
We often give our enemies the means for our own destruction. – Aesop
Faithful are the wounds of a friend; but the kisses of an enemy are deceitful. – Aesop
A doubtful friend is worse than a certain enemy. Let a man be one thing or the other, and we then know how to meet him. – Aesop