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.orgChrist'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. Seraphim Rose
The primary sign of a well-ordered mind is a man's ability to remain in one place and linger in his own company. Seneca
Whatever you do, do it gently and unhurriedly, because virtue is not a pear to be eaten in one bite. Seraphim of Sarov
If there are two cooks in one house, the soup is either too salty or too cold. Persian Proverb
He covered a three-day journey in one day and was bedridden for ten days. Korean Proverb
It is enough to see a person in one task to understand what they are like in ten others. Korean Proverb