The mood of the poem has an effect that is one of melancholy and parting.
Step-by-step explanation:
The use of the line in the way in which the going away of the heart in a ruffling is accentuated in the phrase heart ruffle away, away , it is evident that the poet is going for a melancholic mood that delves into the pain of separation with oneself.
The poem finds the person in isolation and noticing the signs of the heart returning to his own chest in the grim peace that he finds in his somber state of ruffling away from passion to poise in the silence of inaction.