To build a folly is essentially to do something a second time, something at an inopportune moment. That something is always the memory of something forgotten, about which we can paradoxically say "There it is again."
Follies were misunderstood, purposeless constructions. They were often only small, extravagant gestures in a garden, easily whisking off the imagination to distant lands, a sort of time capsule built to awaken the memory and induce surprise in passers-by. They marked locations, organized secondary paths in a park, or simply predicted the arrival of better times—a demarcation, a sacred spot, a mysterious trail, a hill whose tragic rocky nature begged for a tower, a party, or the arrival of summer.
“It is demonstrably true that things cannot be other than as they are. For, everything having been made for a purpose, everything is necessarily for the best purpose.” — Professor Pangloss
They mourn, but smile at length; and, smiling, mourn:
The tree will wither long before it fall:
The hull drives on, though mast and sail be torn;
The roof-tree sinks, but moulders on the hall
In massy hoariness; the ruined wall
Stands when its wind-worn battlements are gone;
The bars survive the captive they enthral;
The day drags through though storms keep out the sun;
And thus the heart will break, yet brokenly live on.
I have not loved the world, nor the world me;
I have not flattered its rank breath, nor bowed
To its idolatries a patient knee,—
Nor coined my cheek to smiles, nor cried aloud
In worship of an echo; in the crowd
They could not deem me one of such; I stood
Among them, but not of them; in a shroud
Of thoughts which were not their thoughts, and still could,
Had I not filed my mind, which thus itself subdued.
I have not loved the world, nor the world me,—
But let us part fair foes; I do believe,
Though I have found them not, that there may be
Words which are things,—hopes which will not deceive,
And virtues which are merciful, nor weave
Snares for the falling: I would also deem
O'er others' griefs that some sincerely grieve;
That two, or one, are almost what they seem,—
That goodness is no name, and happiness no dream.
There is a pleasure in the pathless woods,
There is a rapture on the lonely shore,
There is society where none intrudes,
By the deep Sea, and music in its roar:
I love not Man the less, but Nature more.