Think of your conception, you'll soon forget
what Plato puffs you up with, all that
‘immortality’ and ‘divine life’ stuff.

Man, why dost thou think of Heaven? Nay
consider thine origins in common clay

's one way of putting it but not blunt enough.

Think of your father, sweating, drooling, drunk,
you, his spark of lust, his spurt of spunk.