What exactly is the lyrical subject/object in poetry??

Poems are usually written as a way to express the feelings
of the author. The person or place or event that has created those feelings is the
subject or object of the poem. There isn't one uniform subject or object (different
names for the same thing) in all poetry - it will be different for each
poem.

Lyric poetry is "a form of poetry with rhyming
schemes that express personal and emotional feelings." Words don't have to rhyme for a
piece to be considered a lyric poem, although they can. The more important issue is the
expression of feelings. Consider:

I THINK that I shall never
see

A poem lovely as a
tree.

A tree whose hungry mouth is
prest

Against the sweet earth's flowing
breast;

A tree that looks at God all
day,
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And lifts her leafy
arms to pray;

A tree that may in summer
wear

A nest of robins in her
hair;

Upon whose bosom snow has
lain;

Who intimately lives with
rain.
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Poems are made by
fools like me,

But only God can make a
tree.

Joyce
Kilmer is observing the beauty she sees in trees, admiring the strength of the trunk
growing from the ground, appreciating the sight and sound of the robins nesting amidst
the leaves, recognizing the way the tree changes with the changing seasons. The lyric
subject or object of this particular poem is trees.