Wonder is a feeling like surprise when experiencing something rare or unexpected in a nonthreatening way. It is linked with curiosity, human nature, and intellectual growth. Without wonder, could we every really develop our little baby brains into walking, talking, creative adults?
Descartes claimed that wonder is the first of all the passions. Plato wrote about wonder being integral to all philosophy. Aristotle likened wonder similarly, as in viewing beautiful and horrible paintings with the same degree of wonder.
Wonder is a great thing. It is what makes people explore uncharted territory, learn why the sky is blue, and take up passions. Without wonder, I don't know that anyone could experience any other emotion. We might as well be robots without it.