"you can't cross the sea merely by standing and staring at the water." what does it mean and why does it matter?

It means that you can't accomplish a big job by just sitting around and doing nothing, and thinking you can't do it. You have to do something about it and not stand around! It matters because it's true haha and I deal with the same thing, I have to do something or I want to do something but it looks too hard so I don't do it and just worry instead. 

An objective statement is a concise, position-centered statement describing the value you can add and the needs you can fulfill. An objective may include a brief statement of skills and qualifications you will bring to a position. A professional summary is longer and provides more detail than an objective statement.

Q2.  Im not sure but probably refracting since that would bend light coming in and make objects appear bigger,

Also sorry to hear that no one answers you questions.. :(