Apollonius of Tyana, Letters 98

βραχὺς ὁ βίος ἀνθρώπῳ εὖ πράττοντι, δυστυχοῦντι δὲ μακρός.

Life is short for a person who fares well, but for the unfortunate it is long.

Apollonius of Tyana, Letters 93

πολυλογία πολλὰ σφάλματα ἔχει, τὸ δὲ σιγᾶν ἀσφαλες.

Talkativeness involves many blunders, but keeping silent is safe.