omnia audite, omnia videte, nil dicite;
omnia edite, omnia bibite, nil prodifite;
nunquam aliquid, nisi pro vobis, inhonorati facite

What do the following mean:

1.Errare humanum st.

2.Sic transit Gloria mundi.

3.In necessaris unitas , in dubiis libertas , in omnibus caritas.

4.Draco dormiens numquam titillandus.

I wanna buy a zippo for my boyfriend and i thought that it would be cool to take it on a locksmith (or someone who knows anyway), to CARVE a latin phrase on it….(and his name of course on the other side)…Any ideas? I need an optimistic phrase in latin…(saying something for life …like CARPE DIEM)

for my next tattoo, i wanted to get something with a lot of meaning to me.. so i was thinking about getting an italian saying as a tribute to my family… i’m looking for a short quote about living life.. any ideas?

also, please don’t post ‘carpe diem’ because that’s latin, not italian. thanks!