In one experiment, the strength of blink reflexes to unexpected noises was measured and correlated with degrees of reactions to external threats. Conservatives reacted considerably more strongly than liberals.
Substantial gains could be achieved by organizing everyday activities that grow neurological abilities and sustain brain health. If the ordinary citizen is to achieve brain fitness, they'll need to work at it.
Science is remarkably close to offering a full naturalistic explanation of individual religious experiences, everything from certain belief to moral indignation to mystical rapture to spiritual transformation.