Or, maybe it was a matter of desire. Say, when you just jump between timelines, going from known gate to another, you want to prepare, or maybe ask Gasper for advice (He is your guide during your game, and does instruct you many times on your next objective). Say, with the gate to Zeal, they wanted to find out what that new time was! Or, with 600 AD, they wanted to stop Magus from "creating" Lavos.