I can fairly understand the concept of gravity as a curvature in space time in general relativity, but so far I could not understand completely the tidal forces explained by the curvature of spacetime. When the moon is on one side of the earth, the oceans on this side come closer to the moon, AND the oceans on the opposite side goes far from it, causing high tides on both sides. Now, I can understand the effect on the opposite side explained by newtonian gravitation: the earth itself suffer a force stronger than the water on the opposite side. So far so good. But I cannot explain the same effect thinking in a spacetime curvature. I can see why a more stretched spacetime near the moon would cause high tides on the side directly facing it, but I cannot visualize how the curvature would cause the same effect on the other side.