He was a high ranking Roman Army Officer. He's important because he, with all his great power and ability to command, was very humble and very faithful in Christ's power. Perhaps I'm using the wrong word, but don't forget the centurion recognized power before anything. He is remarkable because he did not respond exclusively to power. He responded to his understanding of faith.
Read Matthew 8:5:13. It's in Luke to but I'm not familiar with it in that gospel.
Once upon a time there was a cute chicken across the river. There was no way to get to it but then I cut down a tree and pushed it to make a bridge. When the tree landed on the other side the cute chicken was crushed by the impact but instead there was a hot dog instead. I moved on with the hot dog and lived happily ever after on the other side. The decomposing chicken lays there to this day.
Answer: in the first passage the author means lonely as the regular definition which is being alone. He talks about the flowers and things because he is having alone time admiring them. He also talks about how he usually go on this walk to admire plants. Also, he talks about how he is so alone that nature is pretty much his friend.
The second passage refers to being lonely as in the greatness in enjoying your imagination when your friends are not around. For example, boredom can be used as the way this passage describes being lonely. In the first stanza, the poet says that he was wandering lonely as a Cloud that floats on high o'er vales and Hills. The phrase refers to him being roaming around without any purpose. He was all alone like a cloud that floats high in the valley.
Explanation: