I suggest quoting the whole phrase in context:
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To each his suff'rings: all are men,
Condemn'd alike to groan,
The tender for another's pain;
Th' unfeeling for his own.
Yet ah! why should they know their fate?
Since sorrow never comes too late,
And happiness too swiftly flies.
Thought would destroy their paradise.
No more; where ignorance is bliss,
'Tis folly to be wise.
(Last stanza from Thomas Gray's "Ode on a Distant Prospect of Eton College", my emphasis)
Ah, for a great many Protestants context is verboten. It's not only the death kneel of the whole Bestselling Surrender and Evacuate Rupture Doctrine, it's the death kneel of all Protestantism.
That's why Protestantism begins by throwing out a portion of the Old Testament which means they start by asserting that the Holy Spirit is imperfect because the Holy Spirit cannot and did not protect Scripture from the inclusion of error from prior to Christ until the 1500s.
That leaves them with a Trinity that consists of The Father, The Son, and The Holy Self.