did yeats's "The Tower" depicts old age as journey towerds wisdom and dejection

I

What shall I do with this absurdity—

O heart, O troubled heart—this caricature,

Decrepit age that has been tied to me

As to a dog's tail?

Never had I more

Excited, passionate, fanatical

Imagination, nor an ear and eye

That more expected the impossible—

No, not in boyhood when with rod and fly.

does this poem suggets poet's dejection at the approach of old age and at the same time he feels he feels wise than before?