what is the meaning behind this most famous quote of all time?

"To be yourself in a world that is constantly trying to make you something else is the greatest accomplishment" is a quote by Ralph Waldo Emerson. 

The meaning behind this quote is that it is difficult to be true to oneself in a world that is constantly trying to change and mold individuals into something else. The quote suggests that being true to oneself is the greatest accomplishment because it requires courage, strength, and resilience to resist the pressure to conform to societal norms and expectations. It is a reminder that one should embrace their individuality and uniqueness, rather than trying to fit into a mold created by others.