'Maturity' in the Bible

You, therefore, will be perfect [growing into spiritual maturity both in mind and character, actively integrating godly values into your daily life], as your heavenly Father is perfect.

Jesus answered him, “If you wish to be perfect [that is, have the spiritual maturity that accompanies godly character with no moral or ethical deficiencies], go and sell what you have and give [the money] to the poor, and you will have treasure in heaven; and come, follow Me [becoming My disciple, believing and trusting in Me and walking the same path of life that I walk].”