[WhileKelf]

The two different sides of truth for Buddhists is the conventional (or relative truth) and the absolute truth. For a non-enlightened being there are always these two truths but an enlightened being, and only an enlightened being, realizes the two truths simultaneously. One could roughly equate thee two truths as being a state of post-meditation and a state of meditation - we ordinary humans have to be in one state or the other, wheras a Buddha can be in both states at the same time. A Mahayana Buddhist would say this means comprehending the nature of reality as both empty and dependent arising.