What is the main idea of C.J. Dennis' poem "The Circus"?

the answer is already given

The poem conveys the idea that if you haven't seen the circus yet, then what are you waiting for?

The poem's main idea which Dennis wants to deliver is: "Seizing the opportunity". He stresses that one should not postpone any today's work till tomorrow; whenever there is an opportunity, we should take the initiative to benifit from it.