a proverb meaning that the immediate future is uncertain and unpredictable; literally, 'an inch ahead is darkness'.
最近の情勢を見て、一寸先は闇だと感じる人が増えている。
Looking at recent conditions, more people feel that the immediate future is uncertain.
投資の世界では『一寸先は闇』だから、慎重な判断が求められる。
In the world of investing, since 'no one knows what the future holds', cautious judgment is required.
彼は何度も失敗した経験からよく『一寸先は闇』と言っている。
From his many failures, he often says 'the future is uncertain'.