This is one path through On Optimism.  I stronly recommend you use the in-game hints by typing >hint.
These will probably get you through just fine (the last hint is almost always a walkthrough anyway).
But if you really need it, here's the walkthrough:

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>get poem


>x poem

>n

>n

>x frame

>open frame

>x note

>put poem in frame

>close frame

>s

>s


>s


>x southeast door

>open it

>se


>x paintings

>press button

>get poem


>nw

>x sliced door

>open it

>s

>get blank paper

>l in hole

>get wine bottle

>put blood in bottle

>x bloodied paper

>pour blood on bloodied paper

>love

>x good painting

>open frame

>put poem in frame

>x poem

>close frame

>sw

>i

>x stone

>fly

>x plaque

>x silver statue

>x golden statue

>x iron statue


>brock, take needle

>x floor

>stab floor with needle

>push nothing into hole

>x path

>n

>x sign

>x down

>w

>x tree

>x design

>x arrow

>get arrow

>carve "loves"

>x plaque

>w

>w

>n

>n

>open frame

>i

>x for all the tears

>put for all the tears in frame

>close frame

>s

>s

>w

>w

>get blade

>kill me