Arriving home, he learned that the Rising was about to begin in Dublin on the next day, Easter Monday, 24 April 1916. Despite his efforts to prevent such action (which he felt could only lead to defeat), he set out to Liberty Hall to join Pearse, James Connolly, Thomas MacDonagh, Tom Clarke, Joseph Plunkett, Countess Markievicz, Seán Mac Diarmada, Éamonn Ceannt and their Irish Volunteers and Irish Citizen Army troops. Arriving in his De Dion-Bouton motorcar, he gave one of the most quoted lines of the rising – "Well, I've helped to wind up the clock -- I might as well hear it strike!" Another famous, if less quoted line, was his comment to Markievicz, "It is madness, but it is glorious madness." His car was used to fetch supplies during the siege, and later as part of a barricade on Prince's Street, where it was burned out.