Cross-references Explore similar Bible verses on James 1:4 in English Standard Version "And let steadfastness have its full effect, that you may be perfect and complete, lacking in nothing." Mt 5:48 You therefore must be perfect, as your heavenly Father is perfect. 1Th 5:23 Now may the God of peace himself sanctify you completely, and may your whole spirit and soul and body be kept blameless at the coming of our Lord Jesus Christ.