What then ?

This one is from one of my school books . Included in the syllabus by an optimistic person who thought school kids would get the question..

What Then?

His chosen comrades thought at school
He must grow a famous man;
He thought the same and lived by rule,
All his twenties crammed with toil;
'What then?' sang Plato's ghost. 'What then?'

Everything he wrote was read,
After certain years he won
Sufficient money for his need,
Friends that have been friends indeed;
'What then?' sang Plato's ghost. 'What then?'

All his happier dreams came true -
A small old house, wife, daughter, son,
Grounds where plum and cabbage grew,
Poets and Wits about him drew;
'What then.?' sang Plato's ghost. 'What then?'

'The work is done,' grown old he thought,
'According to my boyish plan;
Let the fools rage, I swerved in naught,
Something to perfection brought';
But louder sang that ghost, 'What then

- W.B Yeats