Answer:
The hymn itself was composed in the mid- or late-7th century and so is the earliest surviving Old English poem. Bede records that Caedmon was an illiterate farmer working for a monastery who at first avoided singing. ... As always in Anglo-Saxon culture, the Old Testament God works better than the New.
You use expression by explaining your feeling in writing form. Sadness is one of the most expressed feelings in writing. Here is a site to get you an idea if you want to write a story:
https://www.scoopwhoop.com/saddest-lines-from-literature/#.fs19fnc37
Hope it helps!!!
It was immature
of him to do that.