It’s a dilemma whether to use your time in work and earn money; or use time on studying and gain knowledge. 

Usually people might choose work, which can generate money. But studying is also a kind of work, it gives people useful information and techniques to work for customers, and generate money indirectly. It also allows you to step back and review your project in another perspective. 

We look for balance between work and learn to make solutions which fit customer’s expectation and needs.