Si vis pacem, para bellum—If you wish for peace, be ready for war.
Sic ait, et dicto citius tumida æquora placat—So speaks the god, and quicker than he speaks he smoothes the swelling seas. Virg.
Sic erat in fatis—So stood it in the decrees of fate. Ovid.
Sic fac omnia ... tanquam spectet aliquis—Do everything as in the eye of another. Sen.
Sic itur ad astra—This is the way to the stars. Virg.
Sic leve, sic parvum est, animum quod laudis avarum / Subruit ac reficit—So light, so insignificant a thing is that which casts down or revives a soul that is greedy of praise. Hor.
Sic me servavit Apollo—Thus was I served by 5 Apollo. Hor.
Sic omnia fatis / In pejus ruere et retro sublapsa referri—Thus all things are doomed to change for the worse and retrograde. Virg.
Sic præsentibus utaris voluptatibus, ut futuris non noceas—So enjoy present pleasures as not to mar those to come. Sen.