Understanding 'construe' depends on personal perspective, so different people might construe the same thing differently. The poem was construed as both optimistic and pessimistic, depending on the reader.
Pro Tip 2/3
Context Matters
The way 'construe' is understood can vary greatly by the situation in which it is used. Despite his joking tone, his comments were construed as serious.
Pro Tip 3/3
Misunderstandings Occur
'Construe' can signal misunderstandings, so be mindful when using it to explain how someone may misinterpret something. He construed my advice as criticism, which was not my intention.