When you get the answer, you must check it by substituting b... - Richard Feynman

This quote is attributed to Richard Feynman.

"When you get the answer, you must check it by substituting back into the original equation."

Richard Feynman Truth

Theoretical Physicist American 1918–1988

More from Richard Feynman

"The first principle is that you must not fool yourself, and you are the easiest person to fool."

"What I cannot create, I do not understand."

"The pleasure of finding things out is the most important thing."

"You don't have to know everything to do something."

"Lucy, you got some 'splainin' to do!"

"You must always be honest with the people you love."

"Truth always comes out in the end."

"Honesty is always the best policy."