Understanding is much deeper than knowledge. There are many who know you, but very few who understand you.
In true love every moment can be a moment of discovery. When we love someone we must further our knowledge of this person as much as possible in order to gain the best understanding of this person as possible. As we gain more and more understanding about the person we love, we are able to gauge their reactions to things before they come past, we are able to talk to them in a manner that will produce the most results in times of despair, and we are able to love them to the fullest extent that love will allow.