Bhagavad Gita

ಭೋಗೈಶ್ವರ್ಯಪ್ರಸಕ್ತಾನಾಂ ತಯಾSಪಹೃತಚೇತಸಾಮ್ ।
ವ್ಯವಸಾಯಾತ್ಮಿಕಾ ಬುದ್ಧಿಃ ಸಮಾಧೌ ನ ವಿಧೀಯತೇ ॥೪೪॥
bhogaiśvaryaprasaktānāṃ tayāSpahṛtacetasām |
vyavasāyātmikā buddhiḥ samādhau na vidhīyate ||44||

Gist of the sloka:
These who have only understood the superficial meaning of the Veda's and being keen on obtaining comforts and riches, will never achieve real progress.
Lord Krishna says that by just studying and knowing the superficial meaning of the Veda's would never lead people to understand the Lord. These people are called “Veda vadins”, those who swim in the waters of the Veda's but never go deep into the realize the hidden treasures of pearl.
They argue about the Vedic purports without understanding it. They then spread their ignorance [as knowledge] to the society and head straight to hell. So, is the case with priests [purohits] who have only the verbal knowledge of the verses in the Veda's without having any depth understanding about the meaning. A purohit should be one who is at the elevated state so as to guide the family who seek him. He too has a direct path to Hell for having mis-guided the people.
Those who neglect the quest for deeper understanding of the hidden secrets of the Veda's, they are consider to have committed cheating. All sacred books in most philosophies have hidden meanings which unless sought after, will never open themselves to the seeker. The reason being one should be a genuine seeker, for the God realization secrets to be given out. It is not meant for those who are superficial seekers.
If there is a question about why there is no books, which can over a period of time, provide graded texts, making it easy to understand [modern education system wherein text book is meant only for that grade]; then the answer is that not everyone is meant to understand everything. Therefore, the books are written/provided in such a way that along with the maturity levels of the seeker the books keep opening themselves in a gradual way. Depending upon the strength and determination of the seeker, the books also appropriately provide him with the knowledge. A real guru here substitutes for the graded books by intently knowing and providing the knowledge, appropriate at the seekers levels.
Lord Krishna condemns such superficial seekers as they cause harm to the society at large.