Chuck and Rob work for the same company and earn the same pay. Rob spends his free time taking work-related classes to improve his computer skills, while Chuck spends his free time socializing with friends and attending movies. After five years, what is likely to be true?

Most likely, Rob will get promoted, while Chuck will remain at the same position. Work-life balance is always needed - leisure time is essential to catch up wit friends and enjoy the activities you love the most. However, it is always wise to look at the spare time spent in learning as an investment - you never know how will it pay off (current job promotion or better skill set for a future job).