“We have become too civilized to grasp the obvious. For the truth is very simple. To survive you often have to fight, and to fight you have to dirty yourself. War is evil, and it is often the lesser evil. Those who take the sword perish by the sword, and those who don't take the sword perish by smelly diseases.”

The Worker, 30 January, 1915. Reprinted in P. Beresford Ellis (ed.), James Connolly - Selected Writings, p. 210.

Source: Bird by Bird: Some Instructions on Writing and Life

Variant: He who does not fear the sword he holds is not worthy of holding a sword.
-Hisagi Shuuhei

Source: Death Masks

50
Ki Sayings (2003)
Context: The purpose of ki-aikido is not self-defence; that is a mere by product. It is far more important to learn to control the mind and body. It is too late to try to calm the mind after you take up the sword. First you must calm the mind and then take up the sword. When you raise the sword up overhead, do not cut your ki. Continue to calm the mind by half, half, half and create a living calmness in that infinite reduction. When practicing cutting with the sword, you will find infinitely more value in cutting just five to ten times with ki fully extended, than you would in cutting a thousand time with mere physical strength.

As quoted in Soul of the Samurai (2005) by Thomas Cleary, p. 28
Variant translation: If you have attained mastery of swordlessness, you will never be without a sword.

"Idealism in International Politics", Rectoral Address at Glasgow University (7 November, 1923).
Quoted in The Times, 8 November 1923, according to "Guarantee of Peace: The League of Nations in British Policy 1914-1925" by Peter J. Yearwood, pg 280
Context: Politically, economically and philosophically the motive of self-interest not only is but must... and ought to be the mainspring of human conduct... For as long a time as the records of history have been preserved human societies passed through a ceaseless process of evolution and adjustment. This process has sometimes been pacific, but more often it has resulted from warlike disturbance. The strength of different nations, measured in terms of arms, varies from century to century. The world continues to offer glittering prizes to those who have stout hearts and sharp swords; it is therefore extremely improbable that the experience of future ages will differ in any material respect from that which has happened since the twilight of the human race … it is for us who, in our history have proved ourselves a martial … people … to maintain in our own hands the adequate means for our own protection and … to march with heads erect and bright eyes along the road of our imperial destiny.

Holy Terror: The inside story of Islamic terrorism (1987)

Riyadh us Saleheen, as quoted in Muhammad As a Military Leader, Afzalur Rahman
Sunni Hadith