Sonnet: On Separation

Which tree forever stays with leaves same, old? Its branches, roots and trunk-size, changing keep; It has its days of silver and of gold; The crown and roots keep spreading, wide and deep. The fruits it bears do vary in their size; And number, taste that age and seasons make; It has a period when it stands so nice; The gnawing environs, its life does take. Yet, people praise the tree in fruition stage! And curse it when adverse conditions strike; Nevertheless, none can prevent it age; Men too are treated by this world alike. All through his life, man too can't be the same; Why praise the rising Sun, yet Sun-set blame?