1)
How did Hashem melt him like milk?
1.
Rashi: Like a drop [of semen] from which I was formed. Ibn Ezra - this is like "k'Hituch Kesef."
2)
What is the significance of solidifying him like cheese?
1.
Malbim: He describes how Hashem brought him from nothingness to existence. Semen is liquid, like milk. He hardened it like cheeses in the womb. A fetus is formed from the best of the semen, just like cheese is from the best whey.
