Was Lincoln's Depression a Blessing?

[My Name Is Kate]

Was Lincoln always depressed from the beginning of his life, even before the death of his mother? In other words, did his depression have a physical origin? Imo, that kind of depression is mostly just debilitating, whereas depression caused by life events can build character and enhance intellect and wisdom, and be used as a powerful motivator to overcome obstacles and sometimes accomplish great things.

If Lincoln's sadness could be expressed musically, I think it would sound something like this:

https://www.youtube.com/watch?v=T7k2pmKUXxI