Apocalypse Explained # 103
103. And hast not failed, signifies so far as they could. This is evident from the signification of "not failing," in reference to those who are eager for the knowledges of truth and good, as being so far as they could; for in what now follows, a life according to these knowledges is treated of. Those who are in a life according to these go forward and do not fail; but those who are as yet in knowledges alone, go forward as far as they can, but do not yet have the light of life, from which is vigor.
John 10:3
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The gatekeeper opens the gate for him, and the sheep listen to his voice. He calls his own sheep by name, and leads them out.