The central idea of the third quatrain in the passage is to emphasize the urgency to act against the aging process in love.
How to explain
The details about ideas and global connections support the author's purpose by illustrating that sugar's story has multifaceted consequences. The reference to making fun of time and turning people against it parallels the multifaceted consequences of sugar.
The expansion of sugar, intertwined with ideas, global connections, and consequences, parallels the urgency conveyed in the central idea, emphasizing the need to take action against the inevitable passage of time and the effects it has on love.