Answer:
In today's time, we are living in the best time because we have all the facilities and technologies that fulfil our daily basic needs and extraordinary needs as well. The "shadows" in society and within us means crimes and lack of humanity in our society and within us respectively.
So, we are living in the best time where we have the ability to use all the facilities and technologies to fulfill or daily need but still, there is lots of crimes, corruption, and lack of humanity in the society that comes with negative points of this best time.