You must persevere.

Yale University student Matt Amodio persevered 38 consecutive times on the wildly popular and geeky game show Jeopardy! where the goal is to know more than your fellow contestants and win a lot of money.

He persevered through sheer determination.

You must persevere before you can succeed.

Men's courses will foreshadow certain ends, to which, if persevered in, they must lead. But if the courses be departed from, the ends will change.

He persevered with the hard lessons.

He's determined to persevere in his work on behalf of equality and human rights.

Be the matter what it may, we must persevere.

You need to persevere to succeed in life.

Insisting is stubbornness. To persevere is determination.