A good witness is one who looks you in the eye and tells you the truth. The eyes are the windows of the soul. The quest for maturity is a race God invites us to run. We bring pleasure to God when we grow towards maturity; it is a spiritual quest.
The book of Luke records Jesus saying"Fear Not, little flock, for it is your Father's good pleasure to give you the Kingdom"(Luke 12:32). God has given us the capacity to know pleasure, we can experience it and to serve God gives us great pleasure as well, at least for some of us.
Pleasure is more than food, sexual satisfaction, or an eye for beauty, it is God's good pleasure to have us experience Spiritual maturity. We love labels and label people all the time, but what does the words mean? What does the labels mature and immature mean? It is a matter of personal evaluation.
Evaluate and encourage your own progress opposed to sitting in the "witness stand" passing judgment. A slice of bread is not the whole loaf, but it is a portion of it, so taste maturity today, ("Experiencing God's Pleasure," David Mckechnie, 1989).