肇論新疏 3.146

3.146

執跡迷本，亦猶逐派而亡源。且略標涅槃令其知有，而於正位猶為剩名。計跡為實，空花結果。

Clinging to the traces and losing sight of the root is just like pursuing the tributaries and forgetting the source. For now, nirvāṇa is briefly labeled to let them know of its existence, but in the correct position it is still a redundant name. Conceptualizing traces as real is flowers in the sky bearing fruit.