Vim Vi Repellere Licet
The Cyclopedic Law Dictionary · Walter A. Shumaker and George Foster Longsdorf; ed. James C. Cahill · 1922
The Cyclopedic Law Dictionary
MODO flat moderamine inculpatae tutelae, non ad sumendam vindictam, sed ad repulsandam Injurlam. It is lawful to repel force by force; but let it be done with the self-control of blameless defense, — not to take revenge, but to repel injury.
Co. Litt. 162.