The poet John Keats famously wrote, at the end of his “Ode on a Grecian Urn”, the following:
Beauty is truth, truth beauty—that is all / Ye know on earth, and all ye need to know.
I’m not sure this is good advice for critical thinking (following beauty as an intuitional beacon to truth). Sometimes the truth is messier than this and doesn’t go where you want it to; sometimes the truth is ugly.
But, ultimately, Keats may be right after all (if the nomadic surfer-physicist Garrett Lisi’s theory of everything is correct):
Prometheus Unbound 