The story
Appeared in the 1994 film Forrest Gump, when the lead character Forrest Gump (played by Tom Hanks) says “My mom always said life was like a box of chocolates. You never know what you're gonna get.”
Etymology from Wiktionary, CC BY-SA 4.0.
life is like a box of chocolates
Today it means: Life is full of surprises; you never know what will happen next. Full definition →