Glaciers are water, a bit frozen, but water. Like most other water and some cars and people, such as amateur or professional politicians, they only move uphill if pushed or lifted, and as a rule flow dowhill only. You might wonder in that case, how they get uphill to flow down from, and they do it the same way as most other water; the sun lifts them by turning them into water vapour, mostly by heating water, mainly seawater, so that it evaporates and reaches the heights as snow.
If you or your teacher do not regard this as "glaciers moving uphill" then you are left with very little uphill movement of glaciers, because glaciers do very little wicking. The commonest example is when a glacier moves steeply downhill and reaches a hollow that it can only get out of by moving up the opposite slope. If the pressure from the ice descending behind the hollow is great enough, it will force the lower ice up the slope.One sometimes sees this in liquid water that reaches a sort of concrete ski-jump at the outlet of a large dam, only faster.
The force on the floor and further wall of the hollow is very great of course, so such a J-shaped path does not last very long in glacial terms. The rock soon gets gouged out, leaving a descending channel. One sometimes finds such channels through transverse ridges on mountainsides where once glaciers had passed. One knows that they were glaciers, because for one thing, water would not have followed such a path, let alone smoothed and scraped it in such a way.
In spite of what they tell you in holy books, such as the papers of certain research workers, or prophets, glaciers never were eternal, not in the past, and not yet.
