Final answer:
The exact sentence expressing Thor's view on Loki's trick on Sif is not in the provided excerpts which feature Nora and Helmer from a play. However, Helmer's disapproval of Krogstad's deceit suggests that, in a similar vein, Thor would likely view Loki's trickery very negatively.
Step-by-step explanation:
The sentence that best conveys Thor's point of view about the trick Loki plays on Sif is not directly provided in the given excerpts, but we can infer that Thor might speak of Loki's mischief and its outcomes critically or angrily. Given that the texts provided are from a play involving characters Nora and Helmer, and not from a Norse mythology narrative involving Thor, Loki, and Sif, it seems there might be a mix-up in the question asked by the student.
However, analyzing the theme of deception in the provided texts, we can parallel Thor's probable disappointment or outrage with Helmer's disapproval of Krogstad's 'cunning trick' to get himself out of trouble.
Helmer's views on deception, specifically regarding Krogstad's actions, reflect an intolerance for trickery and deceit. As such, Thor's view of Loki's trick on Sif would likely mirror this disapproval. Based on historical and mythological context, Thor would potentially see Loki's trickery as a severe breach of trust and honor.