I can't tell you but you feel it — April Fool

I can't tell you－but you feel it－¹
Nor can you tell me－
Saints, with ravished slate and pencil
Solve our April Day!

Sweeter than a vanished frolic ⁵
From a vanished green!
Swifter than the hoofs of Horsemen
Round a Ledge of dream!

Modest, let us walk among it ⁹
With our faces veiled－
As they say polite Archangels
Do in meeting God!

Not for me－to prate about it! ¹³
Not for you－to say
To some fashionable Lady
"Charming April Day"!

Rather－Heaven's "Peter Parley"! ¹⁷
By which Children slow
To sublimer Recitation
Are prepared to go!

(F.164/J.65)

[1, 2] I can't tell, Nor can you:: something we know, but cannot tell (that we want no grave lessons).
[4] April Day:: the beginning of spring, of one's youth.
[3, 4] Saints, slate and pencil:: saints who end our happy young days.
[5] Sweeter:: more tasteless (water). a vanished frolic:: a life without fun.
[6] a vanished green:: a mature life.
[7] Swifter, hoofs of Horsemen:: a hurried life without feeling the earth.
[8] Ledge of dream:: a life in imaginary danger.
[9, 10] walk, faces veiled:: to live with our nature covered.
[11, 12] meeting God:: in heaven as we die.
[13, 14] We should not tell the truth to some lady.
[15] fashionable:: following a style designed by others.
[16] April Day:: April Fool's Day, a foolish day. "Charming April Day":: a day silliness enchanting the world.
[17] "Peter Parley":: Samuel Griswold Goodrich (1793–1860), who wrote books of common knowledge for the young.
[19] Recitation:: repetition without one's own thought.
[20] to go:: to start a life with vanished frolic and green.