1, doing good things quietly will have a good return. This poem expresses a truth: good deeds are rewarded in the end. Even without publicity, good things will come as scheduled.
2, downstream of the causal cycle, good people always have good news. This poem emphasizes the view that good people will be rewarded in the end through the philosophical thought of karma.
3, the wicked have bad karma, there are signs of cause and effect. If you want to be lucky, God won't spare you. This poem is about the evil deeds of the wicked. It warns people not to take chances through the concept of karma, because evil deeds will eventually be punished accordingly.