What is Shakespeare saying about love and infatuation in Act 4 of A Midsummer Night's Dream?

There is a sense in which the motif of dreaming is
explicitly related to one of the central themes of the play, which is love and
infatuation. This scene concerns primarily the restoration of the Athenian lovers,
Bottom and Titania to their "proper" states, as Puck has finally managed to sort out the
chaos that he caused, ensuring that Demetrius is in love with Helena, Lysander with
Hermia, and Titania is now back in love with Oberon. Poor Bottom has his head removed
and is restored to the real world of Athens out of the magical forest that has
bamboozled him so greatly. However, note what Oberon says to Puck about what has
happened to all of these enchanted figures when he gives Puck his
instructions:

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And, gentle Puck, take this tranformed
scalp

From off the head of this Athenian
swain,

That he, awaking when the other
do,

May all to Athens back again
repair,

And think nor more fo this night's
accidents

But as the fierce vexation of a
dream.

Infatuation then can
be seen as a "fierce vexation of a dream" that distorts our senses and makes us do
ridiculous things, all in the name of love. Note what Demetrius says about his former
love for Hermia:

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But by some power it is--my love to
Hermia,

Melted as the snow, seems to me
now

As teh remembrance of an idle
gaud

Which in my childhood I did dote
upon...

Infatuation then is
shown to overpower us, distort our senses, and rule our minds, even when this results in
ridiculous scenarios when we show ourselves to be fools. The play seems to be best
summed up by Puck's wry comment, "What fools these mortals be." We show ourselves to be
fools by the way that love impacts us.