One can't predict the weather more than a few days in advance.

There is no way that we can predict the weather six months ahead beyond giving the seasonal average

There is no physical law precluding particles from being organised in ways that perform even more advanced computations than the arrangements of particles in human brains.

Theoretical physics is one of the few fields in which being disabled is no handicap - it is all in the mind.

There is nothing bigger or older than the universe.

I've experienced writer's block, but never for more than a few days.