“A journey of thousand miles begins with a single step.”
It may seem to be a Herculean task, but it starts with a small step. This emphasis the importance on the focus towards your goal and start working, rather than not trying.
Example: I’m feeling defeated by the possibility of completing 30 pages of article writing work by next week but, I suppose if I start writing a minimum of 3 pages daily, I shall finish the same in 10 days.