The speaker feels grateful and special due to the gift of affection.
The speaker’s feelings are well-represented in the last lines.
The moral of my ode is this:
beauty is twice beauty
and what is good is doubly good
when it is a matter of two socks
made of wool in winter.
He appreciates the workmanship put into the socks. Like the poem, the socks are a simple way to show caring. He appreciates them, and the person who made them for him. Mara Mori is special to him, and shows that he is special to her by making him the socks. He resists the urge to shelter this special relationship, and instead lets it breathe and lead a natural life.
We can’t hide away things we value. We need to live with them and appreciate them, whether they be special socks or special people.