Why do we need to get this light from scriptures?
The scriptures, especially the upanishads and the srutis , are the words of enlightened sages, who saw things from the vantage point of enlightenment.
It is important to take these teachings into account while discriminating between the real and the unreal.
Following the unreal foolishly can beget great demerit in the form of weakness, suffering later on.
In the mahabharatha , you can see prince Duryodhana, inspite of repeated instruction by Vidura and Bheesma, following tthe path of body-consciousness and selfishness, and refusing to give even 5 villages to his cousins the pandavas, as requested by Krishna.
He even insulted a sage who had come to his court advising him to make peace with the pandavas, and got cursed in the process.
If he had followed the sages, Bheesma's and Vidura's instructions, he could have had a peaceful relationship with the pandavas,and had a long reign as a king himself , but that was not to be due to his foolishness.
Hence the reason for a proper study of the srutis .The Srutis can be stated to be intellectual benchmarks with respect to the enlightened state of consciousness or the absolute truth. They can serve as a roadmap with respect to the absolute truth and reality of nature, and for attainment of enlightenment oneself.
The smritis, or man-made laws and customs regulating society, can and ought to be modified with changing times and circumstances for material progress in line with new methods and innovations. Negligence in this regard is the cause for deterioration in material standards.
Who knows how much of that is true or false? Why not check it in independent light?
The srutis or upanishads came from enlightened sages.
At present, by satsang with an enlightened master, one can ascertain whether the scriptures are true or not. This is how I was able to comprehend the teachings with clarity and remove my own confusions .
An another way is to attain enlightenment oneself by following the instructions in the scriptures meticulously. Eckhart Tolle and Ramana Maharhi are those who had attained enlightenment without any prior meeting with enlightened sages. From their own vantage point of enlightened consciousness, they were able to understand the import of the scriptures with clarity, and gave their own teachings in this regard too.
In this manner, we can check out the truthfulness or falsity of the scriptures in independent light.
As per Kabir,
" Many deceptive preachers, when critically examined, turn out to be false. "
It is through using the srutis as a benchmark, can one critically examine whether a preacher is correct or not.
Through this one can prevent mass ignorance and adharma, and enable one to pursue a correct course of action.