舟に刻みて剣を求む
Meanings
1
not keeping up with the times; unaware of changing circumstances
Idiomatic expression from a fable in Master Lü's Spring and Autumn Annals. Used to criticize someone who clings to outdated methods or fails to adapt to new situations.
His way of doing things is like carving a notch on a boat to find a lost sword—completely out of touch with reality.
Clinging to old rules when times have changed is no different from carving a mark on a moving boat to find a sword.