Teleios is wider than moral perfection: it indicates ‘completeness’, ‘wholeness’ (cf. Paul’s use of it for the spiritually ‘mature’ in 1 Cor. 2:6; 14:20; Phil. 3:15), a life totally integrated to the will of God, and thus reflecting his character.
R. T. France
Many have a vague idea that they must make some wonderful effort in order to gain the favor of God. But all self-dependence is vain. It is only by connecting with Jesus through faith that the sinner becomes a hopeful, believing child of God.