in one
Meaning
In a single attempt.
He asked me to guess his middle name, and I got it in one.
(theater) Performed downstage between the frontmost pieces of scenery.
Source: en.wiktionary.orgExamples
Christ's kingdom is not of this world, and the world cannot bear it. We constantly rebel, try to make life easier, try to be half-Christian, try to make the best of both worlds. We must ultimately choose - our felicity lies in one world or the other, not in both.
The primary sign of a well-ordered mind is a man's ability to remain in one place and linger in his own company.
Whatever you do, do it gently and unhurriedly, because virtue is not a pear to be eaten in one bite.
If there are two cooks in one house, the soup is either too salty or too cold.
He covered a three-day journey in one day and was bedridden for ten days.
It is enough to see a person in one task to understand what they are like in ten others.