Knowledge and Karma

विद्यां च अविद्यां च य: तद्वेदोभयँ सह ।

अविद्यया मृत्युं तीर्त्वा विद्ययाअमृतश्नुते ।। 

।। 11, ईशोपनिषद् ।।

जो विद्या (ज्ञान) और अविद्या (कर्म) इन दोनों को ही एक साथ जानता है, वह अविद्या से मृत्यु को पार करके विद्या से अमरत्व प्राप्त कर लेता है ।

He who knows at the same time both Vidya (the Knowledge) and Avidya (the Karma), crosses beyond death by Avidya and obtains Immortality by Vidya.

Note: Here "अविद्या" means "Karma". The man who only does Karma even without having any knowledge of Scriptures.