"But grow in the grace and knowledge of our Lord and Savior, Jesus Christ."

2 Peter 3:18

"Study to show thyself approved unto God, a workman that needs not to be ashamed, rightly dividing the word of truth." 

2 Timothy 2:15

"yet, with respect to the promise of God, he did not waver in unbelief, but grew strong in faith, giving glory to God, 

and being fully assurd that what He had promised, He was able also to perform." 

Romans 4:20-21