It is easier to get into something than to get out of it.
Once you've started to dig a hole, you can't get out of it.
You cannot dig a hole in a different place by digging the same hole deeper
A lot of times people are too ego caught up where they made the decision and "We're going to stick with it" and then I had to suffer.
I experienced that sinking feeling you get when you know you have conned yourself into doing something difficult and there's no going back.
In too deep to see the diamond, down too dark to see the gold. Now he won't let go of the shovel, and he cannot dig out of the hole.
Don't get trapped by looking at what the price was that you paid for some stock originally.
Letting bygones be bygones is a basic principle in economics.
Why did the Germans and Japanese keep fighting after 1943 when every rational hope of victory had disappeared?