Digital Art: Abstract female drawing

This is a drawing I made recently, it took about 17 hours to complete this piece, while drawing this it made me realize that there is more to abstract art.
Life is an abstract art, and it’s up to you to make sense of it.
But nobody is visually naive any longer. We are cluttered with images, and only abstract art can bring us to the threshold of the divine.
Art is freedom. Being able to bend things most people see as a straight line.
Instrument used: 0.7mm mechanical pen on Autodesk Sketchbook.
Below are some of the build up to the final piece of this drawing