'Strive' in the Bible

“Strive to enter through the narrow door; for many, I tell you, will seek to enter and will not be able.

Now I urge you, brethren, by our Lord Jesus Christ and by the love of the Spirit, to strive together with me in your prayers to God for me,

For it is for this we labor and strive, because we have fixed our hope on the living God, who is the Savior of all men, especially of believers.