Will discipline always require something self-evident reason that can't be explained?

I am a person with no ambition and no desires. I do not understand how people can choose to be disciplined and whenever I look up guides it seems that it is required for you to already be able to get disciplined, as if it is self-evident how via some innate reason.

Is it not possible to get discipline externally somehow?

I'm deciding whether to completely give up or not, thanks.