3 websites for Latin expressions and phrases: Latin Mottos, Latin Phrases & Quotes, Latin Quotes

I came across this saying of Cicero at the first website--Legum servi sumus ut liberi esse possimus - We are slaves of the law so that we may be able to be free. (Cicero)

There's also Serious Latin. One from that website: Si tacuisses philosophus mansisses
If you had kept quiet, you would have remained a philosopher.