The speaker is reflecting on how much natural richness, energy, and love gets thrown away in youth. There is a strong sense that we each carry a kind of inner treasure, but some of it slips out through carelessness, distraction, or delay. The image of clouds cheating thirsty blossoms suggests that even the world can fail to use what it is given, while the speaker admits to wasting his own share too. The repeated cry of “waste, waste, waste” sounds almost anguished.
The mood is wistful and urgent, with a sharp edge of warning. Youth once felt endless, hazy and golden, but now the speaker sees how brief mortal days really are. The final lines shift from regret to caution: if we keep wasting this wealth, we will be left with nothing but painful memories when we face death.