For all the losties (or LOST fans) out there this needs no presentation. Everyone knows that when you travel time in a regular basis you need a constant to latch on to. A constant is an object or person that exists in both periods of time, that the traveler deeply cares about and could recognize. If a constant is not found, the oscillations between different times will become more frequent and chaotic until the individual dies from what appears to be a severe brain aneurysm.
Desmond David Hume, saving us from extreme nose bleedings by being our constant since 2007.