To be a master
The phrase 'ein Meister sein' in German is used to express the idea of being an expert or having a high level of skill in a particular area. It is often used to describe someone who has achieved a high level of proficiency or mastery in a certain field or activity. The word 'Meister' can also be used as a noun to refer to a person who has achieved this level of expertise.
One must be a master in drawing.
This sentence is using 'ein Meister sein' to express the idea that mastery is required in the field of drawing.
He always claims to be a master in chess.
In this example, the speaker uses 'ein Meister sein' to indicate someone's alleged expertise or skill level in chess.
You must become a master in mathematics to solve this problem.
This phrase uses 'ein Meister sein' to emphasize the need for a high level of skill in mathematics in order to solve a specific problem.