6.40 The Lord said  Neither here nor there is destruction for him who has begun Yoga with faith and has then fallen away from it. The meaning is that there is no destruction either in the form of failure of attainment of desires or in the form of Pratyavaya, which means the attainment of what is undesirable because of defects in the performance of works. Therefore no one who practises this incomparably auspicious Yoga ever comes to an evil end in the present, past or future.

Sri Krsna explains how this is so: