You know, "Hope springs eternal," Elvira. If even one of them recognizes the error of his ways, it will be worth having to endure all the noise.
Pope is talking here about how the book of fate is hidden from us, leaving us unknowing about anything but the "page prescrib'd," our present state, and why this lack of foreknowledge is a blessing that spares us from unbearable suffering:
Oh blindness to the future! kindly giv'n,
That each may fill the circle mark'd by Heav'n:
Who sees with equal eye, as God of all,
A hero perish, or a sparrow fall,
Atoms or systems into ruin hurl'd,
And now a bubble burst, and now a world.
Hope humbly then; with trembling pinions soar;
Wait the great teacher Death; and God adore!
What future bliss, he gives not thee to know,
But gives that hope to be thy blessing now.
Hope springs eternal in the human breast:
Man never is, but always to be blest:
The soul, uneasy and confin'd from home,
Rests and expatiates in a life to come.
https://www.poetryfoundation.org/poems/44899/an-essay-on-man-epistle-i