Speculations in Idealism Hegel says in his Greater Logic:
"This only perhaps can be remarked, that hitherto the determination of quantity has been made to precede quality and this as is mostly the case, for no given reason. It has already been shown that the beginning is made with being as such, therefore, with qualitative being... It is easily seen from the comparison of quality with quantity that the former by its nature is first... The qualitative determinateness, on the other hand, is one with its being: it neither goes beyond it nor is internal to it, but is its immediate limitedness. Quality therefore, as the immediate determinateness, is primary and it is with it that the beginning must be made."
This is from the beginning of phenomenology. What your senses immediately perceive is reality. We are attached to the world through our bodies and psyches. To reject the world as having no being is to deny the reality of the body which you are. What we sense is first in knowledge. We cannot doubt the world's existence without first knowing the world. That's the consequence of being born. This results from our understanding of truth. Even if we were all just minds like Bekerley said, the idea of truth would be a correspondence of our thoughts with reality, although the reality is purely immaterial. It wouldn't be thought to thought without any reality involved. But we know we are inof this world, so that first thoughts which bind all our others is that we are a part of a world which has true existence