I left out the following few sentences. Thank you.
1) He has a rational attitude and a practical mind. He is not inclined to admire the charm of nature or to daydream; he is active and ready to react to difficult situations.
2.The two main lexical items in this extract are the sea and the ship. The sea is connected with the idea of the shipwreck, with hostile nature, especially in the first paragraph.
3. It is then connoted as something which separates Robinson at first from the ship and then from the land.
4. The ship represents what remains of Robinson’s old world, it is a link with civilization, a source of materials, a means to survive.
5. Nature is regarded as something to control and manipulate to his own advantage.
4. Fix the run-on.
http://grammar.ccc.commnet.edu/grammar/runons.htm
Everything else is fine.