VERY IMPORTANT FOR nimblenesses sake

 Excesses of any of these attitudes are bad:

thinking you can't go wrong, making going wrong a self-fulfilling prophecy

thinking you can go wrong, making not going wrong a self-fulfilling prophecy

thinking you can go wrong, making you doubt times when actually going right, does seem like that is what it will be.

thinking you can't go wrong, and you're right, can lull one into complacency when that isn't true, which leads back to the first?

Anyway, thoughts along t hese lines i'll let you lot hash it out.