The Mortal Instruments: City of Bones

Facilis descensus Averno;
Noctes atque dies patet atri ianua Ditis;
Sed revocare gradum superasque evadere ad auras,
Hoc opus, hic labor est.

The descent to hell is easy;
This’s gates lies open night and day;
but to retrace your steps and to escape to the air above,
this is the work, this is the struggle.