The first line of this quote tells us that if we look for ourselves in the world we will only find the sel the world made the ego, the second half of the quote tells us when we are willing to come within to stillness we will find who we truly are.
This quote also activated this saying follow the ego and you will seek but never find follow the spirit and seek and you shall find. We have to be honest with ourselves are we seeking truth or illusion whichever one we are seeking we will find. What are you seeking for?