This sentence means that these are just some small difficulties or setbacks, no big deal.

Among them, "wind and frost" can refer to hardships, difficulties, setbacks, etc. in life. This sentence conveys an optimistic and strong attitude, that is, when facing difficulties, do not overexaggerate its seriousness, but look at and deal with it with a peaceful mind.

This sentence may also imply that experiencing some hardships is part of life and should be faced calmly without being overly afraid.