We all are soul. That is why it is said that we are part of God. We call that part 'soul' but three inexhaustible shackles are attached to the soul, which are called 'mind', 'body' and 'intellect'. These three are adjuncts of the soul and they fence and bind it in their chains.
People today are busy doing all kinds of unrighteous things to satisfy their sensual cravings. They don't think about what is just or injust, sinful or pious. That is why various types of troubles and hindrances come in their way. On the other hand, a person who meditates on the Spirit does not desire any worldly things, just like we never want to eat regurgitated food.
We do not see in the dark. When there is light then you see who is sitting near you or whether the way ahead is clear or not. The absence of light is darkness. When sun sets, then it becomes dark. Likewise when the Master imparts the light of Knowledge we turn towards the sun, the Truth.