I thought of happiness how it is woven
Out of the silence in the empty house each day,
And how it is not sudden and it is not given
But is creation itself like the growth of a tree.
No one has seen it happen, but inside the bark
Another circle is growing in the expanding ring.
No one has heard the root go deeper in the dark,
But the tree is lifted by this inward work,
And its plumes shine, and its leaves are glittering.

~ May Sarton,  excerpt from The Work of Happiness