most of the rocks are smoother than you think. at least here by the river. where the main force acting on them is abrasion. these rocks are hard, these rocks are dense.
throw the rocks at someone, and it will injure,
throw it at a window, and it will break.
the potential of fuckery is multitudinous.
yet, recall, that most of the rocks are smooth.
far away, near a faultline, or high in the mountains, rocks get more troublsome. slate, and flint and basalt, their break and shatter violently, over time. even the limestone bears the memories of collisions and calamities, in jagged chronicle.
i would not recommend walking barefoot, tempting the outcropping to bite.
i shall not argue, it is true enough that from the right perspective, or the precise resolution, the smoothest of surfaces, is actually, cracked and distorted. it can also be said, that the most jagged of rocks, when held in aggregate, is just as shapley.
i have sat on many rocks. and some were a pleasurable massage, and some were a torture to endure. sitting is the true test of things: Piercing harshness or absorption of the outer membranes.
thought is a desire to find a place to sit. a perch that shall fit or conform to reality, even if this reality is threatning.
be sure that in your thought, you don't sit upon a sharp, spike of a rock.