As great oak trees grow from tiny acorns, so many great people or things grew from a small and unimportant beginning, so be patient. A proverb. Many great men were once poor, unimportant boys. Great oaks from little acorns grow.
GREAT OAKS FROM LITTLE ACORNS GROW
Meaning of GREAT OAKS FROM LITTLE ACORNS GROW in English
American idioms English vocabulary. Английский словарь американских идиом. 2012