Final answer:
In the poem 'Aubade', the speaker fears death the most in the future and compares their fear to a 'grim phantasm'.
Step-by-step explanation:
In the poem 'Aubade', the speaker fears death the most in the future because of its potential consequences and its ability to cause terror. The speaker compares their fear of death to a 'grim phantasm', indicating that death is like a terrifying specter that haunts them. The fear of death is described as an 'intolerable agitation of soul' and the speaker feels that they will eventually have to abandon life and reason in a struggle with this fear.