budding genius
a very bright and promising young person. Harry is a budding genius, but he seems like a fairly normal teenager.
Genius is an infinite capacity for taking pains.
Prov. Genius is the quality of being exceedingly careful about everything you do. If genius is an infinite capacity for taking pains, Marilyn certainly has it. She never overlooks a single detail that needs attention.
Genius is ten percent inspiration and ninety percent perspiration.
Prov. People get brilliant results primarily by working hard, not because they have special inborn powers. Child: Betty always does the best drawings in art class. She must be a genius. Father: If you worked hard, you could do just as well. Remember, genius is ten percent inspiration and ninety percent perspiration.
stroke of genius
an act of genius; a very clever and innovative idea or task. Your idea of painting the rock wall red was a stroke of genius.