You cannot lecture on really pure poetry any more than you can talk about the ingredients of pure water-it is adulterated, methylated, sanded poetry that makes the best lectures.
Just as a line drawn on water with a stick will quickly vanish and will not last long; even so, brahmins, is human life like a line drawn on water. It is short, limited, and brief; it is full of suffering. One should do good and live a pure life; for none who is born can escape death.