An achievement by definition is “a thing done successfully with effort, skill, or courage”.

To society achievements are material things, something to touch, to size up, to measure. Being able to measure your success makes it able to measure you, and more importantly, your worth.

To me an achievement is finishing something.
To me an achievement is going out and coming home, not feeling like the day was a waste.
To me an achievement is not bursting into tears during a confrontation.
Waking up and not feeling exhausted.
Being productive.
Being needed. Being wanted.
To me an achievement is creating something inspiring. Creating smiles. Creating happiness.
Being happy.

I think greatness is achieved by those who can be happy and positive while left alone to their thoughts.