Everything pales into insignificance compared to our passionate attachment. In this sense, falling in love is… — Slavoj Žižek

'Father, why is the sky blue?' - the child is not really interested in the sky as such; the real stake of the question is to expose father's impotence, his helplessness in the face of the hard fact, to present the whole chain of reasons leading to it. The blue of the sky thus becomes not only the father's problem, but in a way even his fault. The sky is blue, and you're just staring at it like an idiot incapable of doing anything about it!

Memento mori should be read: don't forget to die.

What is at stake here is precisely the problem of the fulfillment of desire: when we encounter in reality an object which has all the properties of the fantasized object of desire, we are nevertheless necessarily somewhat disappointed; we experience a certain this is not it; it becomes evident that the finally found real object is not the reference of desire even though it possesses all the required properties.