Answer:
The secret of happiness lies in being aware of it.
Step-by-step explanation:
In general our lives, embedded in a mechanical routine, are lived on a superficious level that hardly leaves room for profoundness. Especially in this hyperactive and digitalised age the time becomes our enemy and is treated as such. Only when we can detach ourselves - or as in the case of Anne Frank, when external forces push us involuntary - from the timepressure imposed by society and ourselves, we can return to ourselves and be consciously aware of our ephemeral existence. This automatically leads to realize the incredible luck we have 'to be alive and in the flesh', as D.H. Lawrence wrote in the Apocalypse.