What are some literary devices in act III, scenes 4€“5 in Romeo and Juliet by William Shakespeare?

At the end
of act 3, scene 4,employs a , a truthful statement that sounds
contradictory, when he bidsgood night:

It is so very
late,

That we may call it early by and by.

Though the words 'late' and 'early' are precise
opposites, in this statement, the pair of antonyms work together to communicate to the audience
that the hour is likely some time in the middle of the night. For the hour to be so 'late' as to
be 'early', it is probably 2 or 3 o' clock in the morning, which is simultaneously a very late
time to stay up and a very early time to start the day.

At the start of act
3, scene 4,discuss the time of day with two bird symbols, the
nightingale who represents the night, and the lark who represents the day.

It was the lark, the herald of the morn,

No
nightingale. ()

A nightingale is a bird
who is known to sing nocturnally, while the lark sings upon the start of the day. An early-riser
is sometimes referred to as a lark for this...