the strait gate; the narrow gate
Biblical reference to Matthew 7:13–14; used in religious or literary contexts.
The Bible says, 'Enter through the narrow gate.'
high barrier; difficult hurdle; narrow gate
Figurative extension of the Biblical phrase; used for highly selective entrance exams, competitive job markets, or any situation where only a few succeed.
The medical school of that university is truly a narrow gate.
Becoming a professional musician is a difficult hurdle, but he didn't give up.