Now that my ladder’s gone

I must lie down where all the ladders start
In the foul rag and bone shop of the heart.

Can someone please explain to me what Yeats meant by this. My mind is in such overdrive that it doesn’t speak to me like it normally would…

It’s almost like if you gave me a crayon, I could draw a picture of what it means, but I just can’t put it in words.

Read it in context on this here other website