The reason we call it cornering and not "turning" is because the act is more comprehensive than just turning the handlebars. It's weight placement, line choice, angle, speed, and balance all mixed together. The best way to conquer corners is by using your hips to "open up" to them. The analogy I like to implement with the athletes I work with is thinking of having little spotlights on your hips. Imagine they have to point into the trail to light the way. When you approach a corner, open up the inside knee towards the turn and allow your hips to point/shift to it. This gets everything lined up while you use bike-body separation to displace the weight! Boom!
Carson Beckett, 22 // UCI MTB Racer // Coach // // Student // Outdoor Enthusiast