Here are some short yet deeply meaningful quotes that capture the essence of what you said:

Hardship and patience are the keys to success.

The one who endures hardship with patience—success comes to their feet.

Gold is forged in the fire of hardship; success blooms in the shade of patience.

Patience and hard work never fail.

Today's hardship is the seed of tomorrow's success.

The one who holds patience in darkness—light comes for them.

Learn to endure hardship, keep patience—success will knock on your door itself.

There are thorns on the path to success; patience clears them away.

These are very short but stick in the mind—just as you wanted. If you want more or like any particular one, let me know!