This is just a famous saying, there is no antonym, the original text: learning is like sailing against the current, if you don't advance, you will retreat. My heart is like a horse race in the plain.

Learning is like sailing against the current. If you don't advance, you will retreat. The heart is like a horse running on the plain. If you don't know how to get in and out freely, just let it go, it will soon disappear.

The central idea of these four sentences is probably: know how to learn. Go upstream and go straight ahead.

Everyone loves to play, so don't indulge yourself too much when studying. Once you indulge yourself to play, it's too late to take it back and study hard.