Knowledge without devotion to God produces hatred.
Too much of this book knowledge just leads to doubts and confusion. You get too many doubts asking 'what is this?' and 'what is that?', and you waste a lot of time in this conflict.
Knowledge that is not put into practice is like food that is not digested.
Some say knowledge is power, but that is not true. Character is power.
Service is the highest spiritual discipline. Prayer and meditation, or knowledge of scripture and Vedanta (holy scriptures of India), cannot help you reach the goal as quickly as service can. Service has a double effect, it extinguishes the ego and gives bliss.