"There's always some sort of deep undercurrent running under things for me," he said.
The actor added: "I've had peaks of kind of enlightenment where I felt like, 'Oh, wow. I've got to figure it out. This is it. OK. I have peace. I have bliss.'
"And then, boom, off the wave, into the surf, and you're struggling again. I definitely have those scared to death moments, but they're what make you interesting."
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