The devil strains every nerve to secure the souls which belong to Christ. We should not grudge our toil in wresting them from Satan and giving them back to God.

Be alert and of sober mind. Your enemy the devil prowls around like a roaring lion looking for someone to devour. Resist him, standing firm in the faith, because you know that the family of believers throughout the world is undergoing the same kind of sufferings. And the God of all grace, who called you to his eternal glory in Christ, after you have suffered a little while, will himself restore you and make you strong, firm and steadfast. To him be the power for ever and ever. Amen - First Peter Chapter 5, Verses 8 to 11.