The most terrible enemy is that there is no firm belief. Roman? Long-distance radio navigation system

As long as you keep working hard and make unremitting efforts, there is nothing you can't conquer. Seneca

Not many people can stand firm, stick to the correct viewpoint and tide over the difficulties. Hugo

As long as you have strong willpower, you will naturally have ability, intelligence and knowledge. -Dostoevsky

Nothing in the world is difficult for one who sets his mind to it. Everything is easy in the world, and I'm afraid of careless people.

-Yuan Mei

No matter when or what happens, I will never allow myself to feel a little frustrated.

-Addison

As long as you persevere and constantly enrich your knowledge, you will eventually discover its mystery. —— Yang Zhenning

Little by little, a big warehouse is integrated. -German proverb

There is only one step from greatness to absurdity, but one more step will turn absurdity into greatness. Perth

Faith can move mountains. -Cai E

Isn't it a pleasant thing to persevere and work hard? -Kong Qiu's "Learning the Analects of Confucius"

A trickle can eventually wear off a big stone, not because it is powerful, but because it drips day and night. -Beethoven

There is no need to get up at night and go to bed at five. The most useless thing is to be frozen for ten days a day. Mao Zedong?

Great works are not accomplished by strength, but by persistence. -Johnson

Is that enough?