It is a constructive feeling that must be reinforced so that the connected pleasure lasts even when reality may prove that learning, knowing and understanding can be difficult and require effort.
I like the connection that is made between pleasure and learning, and how at all costs we must enforce and sustain this pleasure for learning so that a child can still feel the joy even when things get tough. If this is fostered in the beginning of a lifetime, then the world becomes a journey to the very end. It creates the work for the child and human to have an engagement with life for the purpose of knowledge and understanding, but at all costs, it is part of the journey and walking it is the point.