'Struggle' in the Bible

Then Rachel said, "I have fought a desperate struggle with my sister, but I have won." So she named him Naphtali.

For our struggle is not against flesh and blood, but against the rulers, against the powers, against the world rulers of this darkness, against the spiritual forces of evil in the heavens.

For I want you to know how great a struggle I have for you, and for those in Laodicea, and for those who have not met me face to face.

In fact this is why we work hard and struggle, because we have set our hope on the living God, who is the Savior of all people, especially of believers.

You have not yet resisted to the point of bloodshed in your struggle against sin.