Disregarding the scriptural injunctions, one who lives driven by desire and greed, does not attain perfection in anything. Neither does he gain happiness nor the supreme Goal.
Scriptures are the recorded utterances of the Seers and Knowers who lived long, long ago. They are like the voice of the Knowers present before us. Through scriptures, the Seers expose us to the complex nature of the world, and the art and science of living. The wisdom, strength, inspiration and guidance scriptures and satsanga (association with the Wise) provide are ineffably great and relevant.
To live by oneself and gain all the insight and discrimination is impossible. So, the best way is to be guided by scriptures. They are a prehistoric rendering of our forefathers who studied the human personality and discovered the ultimate Truth. The wisdom and exhortation they shower are indescribably great and glorious.
Not to heed what they say, and get overpowered by passion and prejudice, is to deny the sublimity and loftiness of human life, and be ruined. Any intelligent person should avoid such a grievous fate.