
Part of this is often misquoted as "We have nothing to fear but fear itself," most notably by Martin Luther King, Jr. in his I've Been To The Mountaintop https://www.americanrhetoric.com/speeches/mlkivebeentothemountaintop.htm speech. Similar expressions were used in ancient times, for example by Seneca the Younger (Ep. Mor. 3.24.12 http://www.thelatinlibrary.com/sen/seneca.ep3.shtml): scies nihil esse in istis terribile nisi ipsum timorem ("You will understand that there is nothing dreadful in this except fear itself"), and by Michel de Montaigne: "The thing I fear most is fear", in Essays (1580), Book I, Ch. 17.
1930s, First Inaugural Address (1933)