The idiom reminds people that even if results aren’t immediate, the “System of the World” (Heaven) keeps a record of effort and will eventually provide a fair return.
Knowledge is the purpose of action, and action is the work of knowledge. Knowledge is the beginning of action, and action is the completion of knowledge.
For those who refuse to let their spirit be caged by age or circumstance, they live by the code of “zhì zài qiān lǐ” – a soul forever destined for the long journey.