Hebrews 5:13-14 tells us,
“For everyone who partakes only of milk is not accustomed to the word of 
 righteousness, but he is a babe.
 But solid food is for the mature, who because of practice have their senses
 trained to discern good and evil.”  

We are all works in progress.  No one has arrived yet, but as the song goes:
“From glory to glory He’s changing me,
 Changing me, changing me.
 His likeness and image to perfect in me,
 The love of God shown to the world.

 For He’s changing me, changing me,
 From the earthly  things to the heavenly.
 His likeness and image to perfect in me,
 The love of God shown to the world.”  (Author Unknown)

Scripture exhorts the seeking of spiritual maturity--
*By putting away childish things:
“When I was a child, I spoke as a child, I understood as a child, I thought as 
 a child, but when I became a man, I put away childish things.”   Says the 
Apostle Paul in 1 Corinthians 13:11

*By cultivating understanding:
“Brethren, do not be children in your thinking; yet in evil be babes, but in
 your thinking be mature.”  1 Corinthians 14:20

*By striving after Christ likeness:
“Until we all attain to the unity of the faith, and of the knowledge of the
 Son of God, to a mature man, to the measure of the stature which belongs to 
 the fullness of Christ.”  Ephesians 4:13

*By partaking of the deeper truths of the Gospel:
“But solid food belongs to those who are of full age (mature), that is, those 
 Who by reason of use (practice) have their senses exercised to discern both
 Good and evil.”  Hebrews 5:14  (Margin notes.)

*By overcoming temptation:
“…I have written to you, young men, because you are strong, and the word
 of God abides in you, and you have overcome the evil one.”  1 John 2:14

Believers are to grow up, to mature--
*Into Christ:
“But speaking the truth in love, we are to grow upon all aspects into Him,
 who is the head, even Christ.”  Ephesians 4:15 

*In love:
“And may the Lord make you increase and abound in love to one another 
 and to all, just as we do to you,
 So that He may establish your hearts blameless in holiness before our God 
 and Father at the coming of our Lord Jesus Christ with all His saints.”
1 Thessalonians 3:12-13

*Through the word:
“Like new born babes, desire the sincere milk of the word, that you may 
 grow thereby.”  1 Peter 2:2

*By increasing in godly characteristics:
“…giving all diligence, add to your faith virtue, to virtue knowledge, to
 knowledge self-control, to self-control perseverance, to perseverance 
 godliness, to godliness brotherly kindness, and to brotherly kindness love.”
2 Peter 1:5-7

*In grace and knowledge:
“But grow in the grace, and in the knowledge of our Lord and Savior Jesus
 Christ.  To Him be glory both now and forever.  Amen”  2 Peter 3:18

It is Jesus who said in Matthew 5:48,
“Therefore you are to be perfect, as your heavenly Father is perfect.”
(Read Vs. 43-47 to know what the ‘therefore’ is about.)

From glory to glory so it shall be as we yield in trust and obedience, to Christ Jesus by the power of the Holy Spirit as ordained by our Heavenly Father!

All glory and honor are Yours, Lord God Almighty!  Amen