The roof, for example, can only press the earth through columns, the arch must support itself, and can only satisfy its tendency towards the earth through the medium of the pillars, and so forth.
Zurajeak zutabeen bitartez bakarrik zapal dezake lurra; gangak eutsi egin behar dio bere buruari, eta pilareen bitartekaritzaz bakarrik jaregin dezake bere bulkada lurmasara eta abar.