To have begun is to have done half the task; dare to be wise.

What's well begun, is half done. [Lat., Dimidium facti qui coepit habet.]

Begin, be bold, and venture to be wise.

Resist beginnings: it is too late to employ medicine when the evil has grown strong by inveterate habit. [Lat., Principiis obsta: sero medicina paratur, Cum mala per longas convaluere moras.]

In all matters, before beginning, a diligent preparation should be made. [Lat., In omnibus negotiis prius quam aggrediare, adhibenda est praeparatio diligens.]

The first step, my son, which one makes in the world, is the one on which depends the rest of our days. [Fr., Le premier pas, mon fils, que l'on fait dans le monde, Est celui dont depend le reste de nos jours.]