the missing word

In all those lines

There must be a word

A word that is worth

Spelling reading thinking saying

A word that is a beginning

Or an ending

A reward

Or a gift

A reason

Or a goal

A place that you have reached

Where you can rest

An achievement 

But if there is no such word

Not yet

The only thing you can do

Is to add more lines

To the story

Of your life