[crabmusket]

> There is a paradox. To build the future requires irrational belief.

I'm not convinced this is true. What is irrational about the possibility of e.g. scientific progress, inventing new products, or creating a viable business?

Irrational belief may be one way to motivate yourself to try those things. But it's not the only way. Calculated risk-taking isn't irrational, is it?