Hebrews chapter 6 has an interesting message for those who have been Christians for a while:
Hebrews 6 Names of God Bible (NOG)
6 With this in mind, we should stop going over the elementary truths about Christ and move on to topics for more mature people. We shouldn’t repeat the basics about turning away from the useless things we did and the basics about faith in God. 2 We shouldn’t repeat the basic teachings about such things as baptisms, setting people apart for holy tasks, dead people coming back to life, and eternal judgment. 3 If God permits, we will do this.
I preached in November at Eastside Community Church on this passage, encouraging us to pursue Spiritual Maturity. Give it a listen – I hope it encourages and stretches you.