It's Always The Second Mistake That Takes You Down

When you make a first mistake, and then you keep blaming yourself for it, instead of gathering yourself up, forgiving yourself, and getting back on the rational path, making usual, rational, correct good decisions and judgements, then you are liable to making a second much more grave of a mistake, which will land you in a worse position.

If you have landed in a pit, you don't sit and weep, and sink deeper, you get up quickly and find ways to get out of the pit.