Thoughts of transgression are worse than transgression itself, and your mnemonic is the odor of meat. The smell of roasting meat is more appetizing than actually eating the meat. The heat of the end of summer is more oppressive than the heat of the summer itself, and your mnemonic is a heated oven. After an oven has been heated several times in the course of a day, lighting it again, even slightly, will produce powerful heat. So too, at the end of the summer, since everything is hot, the heat is more oppressive.
A fever in the winter is more powerful than a fever in the summer, and your mnemonic is a cold oven. Heating a cold oven requires greater heat than heating a hot oven. A fever that succeeds in raising the body temperature in the winter must be more powerful than a fever that raises the body temperature in the summer. Relearning old material that was known and forgotten is more difficult than learning from new material. And your mnemonic is mixing mortar from mortar. It is harder to take hardened mortar, crush it, and mix new mortar than it is to simply mix new mortar.
אמר רבי אבהו: מאי טעמא דרבי, דכתיב: ״למנצח על אילת השחר״, מה אילה זו קרניה מפצילות לכאן ולכאן, אף שחר זה מפציע לכאן ולכאן.
Apropos moonlight and sunlight discussed previously, R' Abbahu said: What is the rationale for the statement of R' Yehuda HaNasi that sunlight diffuses and in that sense is dissimilar to moonlight? It is as it is written: “For the leader, about the morning hind” (Psalms 22:1); just as the antlers of a hind branch out to here and to there, so too, the light of dawn diffuses to here and to there.