Si bene commemini, causæ sunt quinque bibendi: / Hospitis adventus, præsens sitis, atque futura, / Aut vini bonitas, aut quælibet altera causa—If I remember right, there are five excuses for drinking: the visit of a guest, present thirst, thirst to come, the goodness of the wine, or any other excuse you choose. Père Sermond.
Si cadere necesse est, occurrendum discrimini—If we must fall, let us manfully face the danger. Tac.
Si caput dolet omnia, membra languent—If the head aches, all the members of the body become languid. Pr.
Si ce n'est pas là Dieu, c'est du moins son cousin-german—If that is not God, it is at least His cousin-german. Mirabeau, of the rising sun as he lay on his death-bed.
Si ce n'est toi, c'est ton frère—If you did 5 not do it, it was your brother. La Fontaine.
Si claudo cohabites, subclaudicare disces—If you live with a lame man you will learn to limp. Pr.
Si Dieu n'existait pas, il faudrait l'inventer—If God did not exist, it would be necessary to invent him. Voltaire.
Si fecisti, nega; or nega, quod fecisti—If you did it, deny it. An old Jesuit maxim.
Si foret in terris, rideret Democritus—If Democritus were on earth now, he would laugh. Hor.
Si fortuna juvat, caveto tolli; / Si fortuna 10 tonat, caveto mergi—If fortune favours you, be not lifted up; if she fulminates, be not cast down. Auson.