When God commands Abraham to sacrifice Isaac, Abraham cannot explain himself. He cannot say, as Agamemnon could when sacrificing Iphigenia, that a higher ethical purpose demands this terrible act — that the sacrifice is for the good of the people, that the universal requires it. Abraham has no such justification available. What God demands of him transgresses the ethical absolutely: to murder one's own child is a crime by every ethical standard. Abraham must act from a different register entirely — not from the universal but from his absolute singular relation to God.
Kierkegaard uses the word "teleological" deliberately: a suspension of the ethical is justified, if at all, only by a higher telos — a purpose beyond the ethical. But this higher purpose cannot be stated in ethical language, cannot be made comprehensible to the community, cannot be verified by any universal criterion. Abraham cannot tell Sarah, cannot tell Isaac, cannot tell the servants what he intends and why. He is absolutely alone with his God and his terror, without any framework that could make his action intelligible to others. This isolation is the mark of genuine faith rather than tragic heroism.
Johannes de Silentio does not claim that such faith is good or that Abraham should be imitated. He asks, more unsettlingly, whether such faith is still possible — whether the modern person, saturated in ethical rationality and Hegelian world-history, retains the capacity for a relation to God so absolute that it could, in principle, suspend every other obligation. The question is not whether one should believe but whether one can — whether the category of the absolute individual standing in absolute relation to the absolute still has any existential reality, or whether it has been dissolved into the ethical and the social.
The concept appears in Problema I of Fear and Trembling (1843). Kierkegaard was acutely aware of the risk of misreading: the teleological suspension is not a license for any individual to claim divine sanction for ethical violations. The category applies only where the individual is genuinely in absolute relation to the absolute — a condition so rare and so vertiginous that few could honestly claim it.