MEDITOR

The notes here are taken from the actual Scala, so be warned that references to the "previous" proverb refer to its order in the Scala, not its order here. You can read more about the word at the Verbosum blog: MEDITOR.

Saepe intereunt aliis meditantes necem.

Seria meditare. ~ Note: Note the imperative form of this deponent verb: meditare.

Pervigili cura semper meditare futura. ~ Note: This is one of the sayings collected by Wegeler, 889, hence the rhyme: cura-futura. Note the imperative form of this deponent verb: meditare. Since you is the implied subject of that imperative, it means that cura must be in the ablative, not the nominative; pervigili is a good clue for that, too.

Qui meditatur discordias, diligit rixas.

Exsilia, tormenta, bella, morbos, naufragia meditare, ut nullo sis malo tiro. ~ Note: Note the imperative form of this deponent verb: meditare. The noun tiro is in agreement with the implied subject of the verb sis: ut nullo sis malo tiro, "so that you not be a novice to any kind of evil."

Agere volentem semper meditari decet. ~ Note: The infinitive agere is a complement to the participle volentem; the infinitive meditari is a complement to the verb decet.

Quidquid agas, operis primo finem mediteris. ~ Note: The subjunctive here, mediteris, has the force of a command: you should think about, you should reflect on...