Joshua and Caleb said to the people,
"do not fear."
Since time immemorial, those who aspire to do what is right have faced opposition and even ridicule. Yet, the Code of Jewish Law begins with the instructions: "Do not be embarrassed by the mockers." When G-d is with us, there is no reason for fear.
The same response applies not only to fear of others, but to fear for our spiritual well-being. Other than Joshua and Caleb, the spies were afraid that engaging in material life in the Promised Land would undermine the people's ability to lead holy lives. Since G-d is with us, aiding us in our mission to transform the physical world into His home, there is no reason to fear. We can indeed infuse Divine consciousness into all aspects of life, down to the most mundane.