Good thought provoker, thanks mate.

When I read this first I thought - I'll open shove the flop with just about no range of hands. Then I thought about it and figured that that's not really what this is about.

I think this relates closely to what is called flop texture analysis, knowing the nuts and determining the relative as opposed to absolute strength of your hand.

The principle extends to any street, but the difference is most stark on the flop where theoretically you can make a decision for all of your stack before you are strictly speaking required to.

What isn't said is that if I'm at the very bottom of hands that I think should be willing to go all in my opponent should be really bad for me to think he has something worse often enough that it's profitable for me to proceed to go all-in.

It kind of relates to some basic thought exercises I try to go through when in a hand - like I try to determine what my opponent wants me to do and unless the cards clearly dictate a correct move one way or another I tend to go out of my way to disappoint my opponent. You want me to put money in? Ok, I'll fold my overpair. You want a free/cheap card? Ok, here's your massive bet/raise.

When we're at the strongest end of our range we can proceed with no fear and no deep contemplation. But when we're at the weakest, our reasoning needs to be at its strongest.

It's important to give opponents credit - especially when they are weak and passive and betting big.