The word 'Enlightenment' comes from the Latin prefix 'en' meaning 'in, or into', and the word 'lux' meaning 'light', so :
In The Light.
In a spiritual context the concept of The Light is often used to signify the Divine Light of Eternal Truth.
Words used to describe The Light include...
Eternal, Absolute, Truth, Infinite, Unconditional, Love, Oneness, Self, God.
It is said...
Enlightenment is the moment when the temporary reality of the individual self - although real to the self - is shown to have been known from within the darkness of the fog.
And in that moment the destination of the Inner Journey has been reached - in The Eternal Light.