I'm going to need a bit of Wikipedia for this:
"Despite its quick rise to international stardom, Imagine Dragons maintains a band culture of humility, relatability, and creativity... Imagine Dragons is an "atypical band" in that its image diverges from that of the stereotypical rock group. None of the members are "tatted up" and many choose not to attend after-parties, stereotypical fashions that Reynolds claims are "lifestyle choices" rather any part of "the spirit of rock'n'roll." At one point when the band did choose to attend an afterparty, they noted to each other "We don't belong here" as they arrived by foot amongst limos and luxury cars."
With this, I believe that the song 'It's Time' could be in the perspective of a conservative person who views the world as a place where peoples' values have become twisted; however, no matter how tempting these 'values' are, he appears to refuse taking part in them with the lyrics, 'I'm never changing who I am.'
The singer seems to know that his values will set him apart and that there will be challenges. This can be interpreted with the lyrics, 'The path to heaven runs through miles of clouded hell,' as well as, 'This road never looked so lonely.' It's as if he feels alone because the world around him is a cruel place, and he could be trying to find his way through the dark.
No matter how upbeat and fun these songs seem, they truly hold serious themes. That's what I love about Imagine Dragons (and Melanie Martinez)!