he who hesitates

he who hesitates (is lost)

proverb Those who fail to take quick, decisive action will suffer for it or miss a good opportunity. A: "If only I'd invested in that company when they started up, I'd be a millionaire by now!" B: "Well, he who hesitates is lost." A: "You could have mitigated your losses if you'd dealt with the problem right away, but—" B: "Yeah, yeah, he who hesitates. I know."
See also: he, hesitate, who
Farlex Dictionary of Idioms.

he who ˈhesitates (is ˈlost)

(saying) if you delay in doing something you may lose a good opportunity: You should have applied for that job. I’m sure you would have got it. Remember, he who hesitates...
See also: he, hesitate, who
Farlex Partner Idioms Dictionary
See also:
  • teach a man to fish
  • it takes a village
  • village
  • bigger they are, the harder they fall
  • bigger they come, the harder they fall, the
  • best-laid plans go astray, the
  • the best-laid plans
  • the best-laid plans go astray
  • the best-laid plans of mice and men
  • for want of a nail