When someone fails to understand something simple, what's the metaphor that is usually used? "It's not rocket science!" Rocket science is usually used to describe something unbelievably complex. Similarly, we like to invoke the name of famous genius Albert Einstein, either as a compliment to someone intelligent ("he's a real Einstein"), or sarcastically to mock someone unintelligent ("nice going, Einstein"). All these metaphors have one thing in common: they all describe the complexity of our world, and our limited ability to understand it.
Now consider this: it takes a lot to understand these things. A rocket scientist can't just walk into work with the same playful attitude as a kid at a science fair. He must study hard for years, perform many complex calculations, assess any possible risks, and even after all these things, he has a chance of catastrophic failure. Furthermore, there is much he doesn't know. Similarly, Einstein is famous precisely because most of us can't even reach his level of genius. If it takes that much to learn all these things, consider how much it takes to create and maintain all of this! Every law of physics, every particle movement, even logic itself, exists because of one omniscient mind: the mind of God.
It rather makes you think, doesn't it? The intellect of the world's greatest minds pale in comparison. God makes Einstein look like a toddler trying to figure out which hole the block fits in, and getting it consistently wrong. He has literally infinite knowledge, yet human beings often have the audacity to look at Him and say "you're wrong." You're wrong about how you created the Heavens and the Earth. You're wrong about sending a flood to judge the Earth. You're wrong to destroy evil nations. You're wrong to give commands I disagree with. You're wrong to condemn impenitent sinners to eternal punishment. You're wrong to forgive sinners who do repent! All these things we say to God, both believers and unbelievers, and we fail to realise that really, we're just ungrateful 2 year olds trying to explain the universe to a particle physicist. Instead of waving our fingers and throwing our toys out of the pram, let us instead take our places as students of the perfect teacher.