For some Western philosophers, notably Kant, enlightenment is a greater understanding of humanity derived from observations rather than superstitions. The Age of Enlightenment is often referred to as a flowering of scientific understanding in 17th and 18th-century Europe. That said, spiritual enlightenment has its roots in Buddhism and the teachings of established religions, especially, Hinduism, Jainism and Zoroastrianism. Although related concepts – because they both really mean a deeper knowledge – the Western and Eastern versions should not be conflated with one another. Spiritual enlightenment is known as bodhi by Buddhists and moksha in Hinduism. These words roughly translate as either awakening or liberation. As such, spiritually enlightened thought should be considered to be as something akin to a revelation - what Christians might call an epiphany by way of comparison.