All that glitters are not gold?

The proverb "All that glitters is not gold" means that not everything that appears to be valuable or desirable is actually so. In other words, one should not judge something based solely on its appearance. This proverb is often used to caution people against being deceived by superficial appearances. For example, someone who appears to be wealthy and successful may not actually be so, or a product that appears to be of high quality may not actually be so.

There are many examples of how this proverb can be applied in real life. For example, a person may be attracted to someone who appears to be kind and caring, but later discover that they are actually manipulative and self-centered. Or, a person may purchase a product that appears to be a good deal, but later discover that it is cheaply made and does not work well.

It is important to remember that not everything is as it seems, and that one should not judge something based solely on its appearance. It is always important to do one's due diligence and to research something before making a decision.