Answer:
Step-by-step explanation:
Let's start by claryfing what theme means. Every time we are asked to explain or find a theme in literature, we must keep in mind that what we are trying to find is the underlying message, or the main idea(s) provided by that piece of work. It is always extra-helpful to find some more information about the author's backgound (not only7 academically, but) especially regarding his/her social context, historical moment, place of origin and where the author lived, etc. This gives you a wider conception on what influenced the writer to create his or her work.
Now, if you read the paragraph again, you will find two main ideas: the first part is talking about looking at (dreams, the sea...) but you (the reader) is still standing and looking. Nothing more. In contrast, on the second part, the author eagers you to take action - in other words, do not just stand there, passively looking! Move on, step forward decide and enjoy doing with no fear.
What if we take these two ideas to our daily life?
Do you have any dreams? Anything pending to do, but those 'actions' that you would do are only staying in your head? What if you make a decision and go from thoughts to acts?
The theme, then, is reflecting on ideas and desires and then, finding a way to make decisions to let them become acts, real, factual acts that would make a person happy, or to enjoy the actions which, if remained as ideas, would never take place to move forward with their lives.