The quality or state of being hard, literally or figuratively.
The cohesion of the particles on the surface of a body, determined by its capacity to scratch another, or be itself scratched;-measured among minerals on a scale of which diamond and talc form the extremes.
The peculiar quality exhibited by water which has mineral salts dissolved in it. Such water forms an insoluble compound with soap, and is hence unfit for washing purposes.
The work of art, just like any fragment of human life considered in its deepest meaning, seems to me devoid of value if it does not offer the hardness, the rigidity, the regularity, the luster on every interior and exterior facet, of the crystal. Pope Paul VI
Every man of action has a strong dose of egoism, pride, hardness, and cunning. But all those things will be regarded as high qualities if he can make them the means to achieve great ends. Giorgos Seferis
I find myself so easily discouraged. It is pathetic how easily I can be discouraged - easily discouraged by resistance, easily discouraged by opposition, easily discouraged by hardness of heart, easily discouraged by blindness. C. J. Mahaney
Asian people have a unique way about them and a different sense of beauty. It's exotic to me. I like they way Asians project their feelings. There's a hardness to the culture, but at the same time there's a delicateness. Paz Vega
I think there is only one quality worse than hardness of heart and that is softness of head. Theodore Roosevelt