Thanks for answering!

The Roman poet Horatio was defeated in war, and lived in reduced freedom afterwards. He wrote the famous "carpe diem":

sapias, vina liques, et spatio brevi
spem longam reseces. dum loquimur, fugerit invida
aetas: carpe diem quam minimum credula postero.

be truthful, strain the wine, and scale back your long hopes to a short period.
While we speak, envious time will have fled:
seize the day, trusting as little as possible in the next day.

Religion and the Occult help deal with reduced material wealth and reduced freedom, but perhaps a poet who lived in a similar time of his civilization can help as well.