In Tarkovsky's Stalker one character states:
Well done, citizen Shakespeare. It’s frightening to go forward; it’s a shame to go back.
This further reminded me of the passage from Hart Crane's Southern Cross:
It is blood to remember; it is fire To stammer back
The translator of the Russian film however might not know the exact Shakespeare quote so might not have translated it to match the Shakespeare quote. Does anyone know what the exact allusion to Shakespeare is? If it is an allusion. For more context the character does on to state:
Therefore, you commanded yourself in a strange voice. You even became sober out of fear.
Doing the obvious Google searches does not yield any answers.