Aletheia is a conception of truth dependent not on the accuracy of representations in reality but on the act of disclosure, uncovering unconcealing. It concerns bringing things out of hiddenness and unforgetting.
Aletheia is light always struggling with the powers of darkness, lodged in a field of strife. Openness is always threatened and defined against what threatens it.
Aletheia is truth as disclosure whereby disclosedness is the basic character of da-sein in accordance with which it is its there.
Aletheia is the deep structure that clears the way for the history of being to follow. It is accessible to us as one aspect of the experience of being, but structurally aletheia is the very condition of possibility for being itself.
Aletheia is not a skeleton key that unlocks all the enigmas of thought. Rather, it is the enigma itself the matter of thought.
Aletheia is truth, but it is perhaps best translated as this kind of unconcealment, the revealing manifestation of what is.
Aletheia is available only to human being since only human being exists outside itself in the world, immersed in the play of absence and presence that unfolds in the course of history.