Analysis of Whatever Is - Is Best

I know as my life grows older,
 And mine eyes have clearer sight,
That under each rank of wrong, somewhere
 There lies the root of right;
That each sorrow has its purpose,
 By the sorrowing oft unguessed,
But as sure as the sun brings morning,
 Whatever is – is best.

I know that each sinful action,
 As sure as the night brings shade,
Is somewhere, sometime punished,
 Though the hour be long delayed.
I know that the soul is sided
 Sometimes by the heart’s unrest,
And to grow means often to suffer –
 But whatever is – is best.

I know there are no errors
 In the great Eternal plan,
And all things work together
 For the final good of man.
And I know as my soul speeds onward,
 In its grand Eternal quest,
I shall say as I look back earthward,
 Whatever is – is best.