|In many faith traditions we hear of ages, stages, or chunks of years... with certain qualities. In Sanatana Dharma, for example, the yugas (ages, eras) are often spoken of in relation to humankind's present, past, or future experience or general state in regards to overall well-being, consciousness or shifts in consciousness, and general enlightenment or lack thereof. For example, the Dark Age, the age of Kali or the Kali Yuga, is described as a generally distressing period; a period of suffering for many.
Sri Sri Swami Shree Yukteswar Giri examines and explains the yugas, and clarifies the current age in The Holy Science. For an overview of this incredible work, visit Wikipedia/The Holy Science.
who lies down is Kali