We Shall Not Cease From Exploration

We shall not cease from exploration
And the end of all our exploring
Will be to arrive where we started
And know the place for the first time.

Through the unknown, remembered gate
When the last of earth left to discover
Is that which was the beginning;

At the source of the longest river
The voice of the hidden waterfall
And the children in the apple-tree

Not known, because not looked for
But heard, half-heard, in the stillness
Between two waves of the sea.