There’s nothing in the world I know That can escape from love, For every depth it goes below, And every height above. It waits as waits the sky, Until the clouds go by, Yet shines serenely on With an eternal day, Alike when they are gone, And when they stay. Implacable is Love,— Foes may be bought or teased From their hostile intent, But he goes unappeased Who is on kindness bent.
 Henry David Thoreau, A Week on the Concord and Merrimack Rivers (1849). copy citation

Context

“No show of bolts and bars Can keep the foeman out, Or ’scape his secret mine Who entered with the doubt That drew the line. No warder at the gate Can let the friendly in, But, like the sun, o’er all He will the castle win, And shine along the wall. There’s nothing in the world I know That can escape from love, For every depth it goes below, And every height above. It waits as waits the sky, Until the clouds go by, Yet shines serenely on With an eternal day, Alike when they are gone, And when they stay. Implacable is Love,— Foes may be bought or teased From their hostile intent, But he goes unappeased Who is on kindness bent. Having rowed five or six miles above Amoskeag before sunset, and reached a pleasant part of the river, one of us landed to look for a farm-house, where we might replenish our stores, while the other remained cruising about the stream, and exploring the opposite shores to find a suitable harbor for the night.” source