Alexandre Dumas said this quote

Indeed, four men like them, four men devoted to each other from their money to their lives, four men always supporting each other, never retreating, performing singly or together the resolutions they had made in common; four arms threatening the four points of the compass or all turning to a single point, must inevitably, be it surreptitiously, be it openly, be it by mines, by entrenchments, by guile, or by force, open a way to the end they wanted to reach, however well defended or far off it might be.