Hypothesis: Voice is the ability to communicate with precision, whether you hope to communicate punchy one liners or epic quests through baroque dreamscapes.
Finding your voice means developing the craft of clearly articulating your ideas and feelings. You do not arrive at an answer through search, but hone a skill with practice.
Clarity is not short sentences. Or long sentences. Or sentences of any particular flavor. Clarity is forging your imagination into a pebble that, when tossed, will ripple through other minds.