"De Consolation" is a poem from Clark Ashton Smith (CAS) which also exists in a French version that was unpublished in his lifetime. It is not available at The Eldritch Dark, so here is the complete text in English:
All things are nothing, my sad heart;
To dream is the best oblivion.
Weep not the absent flesh--
The flesh is also a dream.
Keep always the Memory--
It is the most mystical delight.
All things that pass become the future
In its magical eternity.
As the title indicates, this poem is supposed to be "Of Consolation", and indeed the broad vision of transcending the transitory aspects of life provides a welcome viewpoint for reflection.