With whom no variableness , neither shadow of turning

What type of sentence is this

this is not a sentence.

Explanation:

It fortifies my soul to know

That, though I perish, Truth is so:

That, howsoe'er I stray and range,

Whate'er I do, Thou dost not change.

I steadier step when I recall

That, if I slip, Thou dost not fall.

in that passage i would say the sentence which best describes the overall impact of the setting is when they mention the absence of people because it suggests that taking a walk at night is unusual.

science.

modern problems require modern solutions.