It's a metaphor for the worst-case scenario. The poet means the most difficult, terrible, and difficult conditions that everyone faces at some point in their lives. These conditions can be physical or emotional and can last for a short time or over an extended period of time. Sore means hurt or damaged. So this means that sore things will happen to him/her during this storm. The poet is saying that even though these things are happening to him/her, he/she should not feel sorry for himself/herself. Even though there are bad things happening, they could be much worse, and it's important not to take them too seriously. At any moment, the storm might pass and life will go back to normal. This poem is about facing reality. Even though things are going badly for the poet, he/she shouldn't feel sorry for themselves. Life will go on after the storm, and people face many other problems than just him/herself. This shows that there are more important things in life than feeling sad about one's self.