I adore clothes - they're my weakest link! My mother was the same, and she taught me always to look polished.
A chain is no stronger than its weakest link, and life is after all a chain.
Companies spend millions of dollars on firewalls, encryption, and secure access devices and it's money wasted because none of these measures address the weakest link in the security chain: the people who use, administer, operate and account for computer systems that contain protected information.
The weakest link in a chain is the strongest because it can break it.
Being a question on 'The Weakest Link,' that was quite a moment.