The saying, "the devil you know is better than the angel you don't know," sums up how people tend to stick with what they are comfortable with, even when it's not ideal. We frequently choose the security of a well-known task to the unpredictability of a fresh opportunity. Even though the devil you know can be tricky, at least you are aware of his tricks and know how to avoid them. 

However, even though the "angel" you don't know seems hopeful, what if it causes unforeseen problems? It's similar to having to decide between a brand-new, perhaps dead-end road and a rough, well-traveled path you've traveled a thousand times. 

This expression serves as a reminder that while it may seem safer to stick with what you know, but it can also prevent us from discovering something better. It’s a dance between caution and courage deciding whether to settle for what you know or take a leap into the unknown, hoping for something greater.