Nothing prepares you for a total eclipse. Then, nothing prepares you for your first volcano, geyser, tornado, hurricane, or earthquake, either. Words fail when forced to describe natural phenomena that engage all of the senses.
Words are enough to relate the science of an eclipse. The moon passes between the earth and sun, and blocks the sun for a brief moment. Even though the moon is 400 times smaller than the sun, it’s also about 400 times closer to Earth than the sun.