language used is often simple

Suggested language implies words shaped by setting letters together...aka a complex/composite of more than one. Sound implies whole (perceivable) setting itself apart (perception) aka whole (oneness) into partials (ones) aka simple/single.

Sound (simple) or Words (complex)...one is perceivable as self; the other suggested by others. Consenting to the latter; tempts one to ignore former.

Of course water can curve, it's a fluid...water at rest is always flat, level, and horizontal.

REST, noun - "cessation of motion" contradicts FLUID; adjective (Latin fluere) - "to flow". Water (matter) seeking level implies balancing (momentum) within motion.

The trick...ones consent to suggested words tempts one to hold onto definitions (definite; affixed), which implies ones ignorance of being (life) moved (inception towards death).

It can take the shape of anything you put it in, or forces applied to it

a) What if it (matter) already exists within (momentum) an outside force (motion)?

b) What if form (life) can only be shaped within the mold (momentum) of flow (motion)?

c) What if calling matter (water) motion (fluid) tempts one to ignore the perceivable mold for those molding suggestions aka those who make the calls?

equally on all sides

How can sides differentiated from one another be equal? While you're considering that...why do few suggest equality (same) through diversity (difference) towards many?