Calvin Coolidge, the thirtieth United States President, once famously stated that nothing in this world could take the place of perseverance.
From his point of view, persistence and determination are omnipotent. Persistence is key to success. No matter how smart, talented, or wise you are, if you give up, you will get nowhere.
If your kid is brilliant, they will be able to excel for a little while, but without work, they will fall behind. No kid, no matter how great, will understand how to solve integrals without learning.