GA18:89 – telos (τέλος) e teleion (τέλειον)

To summarize, we must hold primarily in view the fact that τέλος   has the determination of limit. This limit-character is to be apprehended as that beyond which there is nothing further, the end at which something stops. But here we must be careful. A path through a meadow stops at a garden fence. But the garden fence is not   τέλειον. Being-the-path is not as such determined by the garden fence. That at which the path stops is itself a being which, in the same manner, is like that which stops at it. Presumably, τέλειον is not a being, or a piece of a being, whose end it constitutes. Rather, τέλειον is a way of being, a mode of being itself. Τέλειον is limit, but not as a being in relation to another being whose limit it is. In this sense, a thief is completed insofar as the limit is not outside of him. The how of his being, stealing itself, has come to its definite possibility. He is not a good thief for having come across a great stash of money. The τέλειον is a determination of the being of beings, and not some property such as the white or black of something. The beyond-which-nothing has the character of limit in the sense of a determination of being. [GA18MT  :61-62]