those who say it cannot be done should not interrupt those doing it

== English == === Etymology === Possibly from a Chicago newspaper in 1903: “Things move along so rapidly nowadays that people saying: ‘It can’t be done,’ are always being interrupted by somebody doing it.” [1] === Proverb === those who say it cannot be done should not interrupt those doing it People who dispute that a task is possible should not impede those people who attempt to do it. ==== External links ==== https://quoteinvestigator.com/2015/01/26/doing/