Explain what Frost means by the simile that occurs in lines 43-47.

the poem your refering to is branches

Explanation:

Birches

When I see birches bend to left and right

Across the line of straighter, darker trees,

I like to think some boy's been swinging them.

But swinging doesn't bend them down to stay.

Ice storms do that. Often you must have seen them (5)

Loaded with ice a sunny winter morning

After a rain. They click upon themselves

As the breeze rises, and turn many-colored

As the stir cracks and crazes their enamel.

Soon the sun's warmth makes them shed crystal shells (10)

Shattering and avalanching on the snow crust—

Such heaps of broken glass to sweep away

You'd think the inner dome of heaven had fallen.

They are dragged to the withered bracken by the load,

And they seem not to break; though once they are bowed (15)

So low for long, they never right themselves;

You may see their trunks arching in the woods

Years afterwards, trailing their leaves on the ground

Like girls on hands and knees that throw their hair

Before them over their heads to dry in the sun. (20)

But I was going to say when Truth broke in

With all her matter-of-fact about the ice storm

I should prefer to have some boy bend them

As he went out and in to fetch the cows—

Some boy too far from town to learn baseball, (25)

Whose only play was what he found himself,

Summer or winter, and could play alone.

One by one he subdued his father's trees

By riding them down over and over again

Until he took the stiffness out of them, (30)

And not one but hung limp, not one was left

For him to conquer. He learned all there was

To learn about not launching out too soon

And so not carrying the tree away

Clear to the ground. He always kept his poise (35)

To the top branches, climbing carefully

With the same Pains you use to fill a cup

Up to the brim, and even above the brim.

Then he flung outward, feet first, with a swish,

Kicking his way down through the air to the ground. (40)

So was I once myself a swinger of birches

And so I dream of going back to be.

It's when I'm weary of considerations,

And life is too much like a pathless wood

Where your face burns and tickles with the cobwebs (45)

Broken across it, and one eye is weeping

From a twig's having lashed across it open.

I'd like to get away from earth awhile

And then come back to it and begin over:

May no fate willfully misunderstand me (50)

And half grant what I wish and snatch me away

Not to return. Earth's the right place for love;

I don't know where it's likely to go better.

I'd like to go by climbing a birch tree,

And climb black branches up a snow-white trunk (55)

Toward heaven, till the tree could bear no more,

But dipped its top and set me down again.

That would be good both going and coming back.

One could do worse than be a swinger of birches.

—Robert Frost

you shopuld find your answers here if you need more. the answer is the infinite variety of human nature