I think you mean Mach' Dir keine Sorgen über all dies which translates as Don't worry about all of this
As keen as mustard or as keen as a kitten
The expression is to be "keen on" something or someone, if you are an enthusiast or a lover.
A dog has a keen sense of smell, a bat has a keen sense of hearing, a cheetah has a keen sense of sight
Ray A. Keen has written: 'Keen, Koehler, Kuntzi'
Geoffrey Keen's birth name is Geoffrey Ian Keen.
Pat Keen's birth name is Patricia Margaret Keen.
Keen Wong has written: 'Wong Keen, a Singapore abstract expressionist'
"Keen" is and adjective, used to describe something as sharp or acute. "The sword had a keen edge." "He was a man of keen intellect." It can also be used to express enthusiasm. "He was keen to learn another language."
Luke Keen is 6'.
Mustard has a sharp or keen taste. "Keen as mustard" means being sharp-minded.
Keen is an adjective. It is used to describe a noun or a pronoun as sharp, or finely sharpened. Examples include a keen edge, keen wind, keen eyes, keen mind.
A banana is a non-example of keen.