"As individuals express their life, so they are." I think this is a beautiful quote. They way you live your life each day, the work and effort you put in, is exactly what you're going to get out. Not just 'spiritually' or by feeling happy, I think Marx is saying materially also.
Each new productive force develops the division of labor. So, with each new app making everything a little bit easier for us, we are increasing the productivity of our nation, and further developing the division of labor.