This poem comes from Autumn Leaves:

Under stout arms of ancient beech,

Beside placid, looking-glass pool,

Lessons that only nature can teach

In the amphitheater of her school.

Ripples run out from cast-in stone,

Obstructed, lapse into still serenity.

‘Tis music on the ear as lesson travels home.

We find peace, balance, and complete tranquillity.