'Exert' in the Bible

For sin will no longer be a master over you, since you are not under Law [as slaves], but under [unmerited] grace [as recipients of God’s favor and mercy].

Let us therefore make every effort to enter that rest [of God, to know and experience it for ourselves], so that no one will fall by following the same example of disobedience [as those who died in the wilderness].

And the beast was given a mouth (the power of speech), uttering great things and arrogant and blasphemous words, and he was given freedom and authority to act and to do as he pleased for forty-two months (three and a half years).