The best way to grow in the Lord is through personal Bible study. What you learn and discover by your own efforts stays with you, and is more appreciated. If you have been saved many years, and know the basic doctrines, you may feel that there is really no more to learn. Well let me tell you that you are missing an incredible multitude of spiritual riches.
The Bible is an inexhaustible mine. Some of the nuggets are iron (Knowledge), others are silver (Comprehension), others gold (Insights), But if you dig deeper you will find many beautiful diamonds (Revelations). A superficial reading of the word will never do. It takes work and effort to understand a proverb; and the interpretation: the words of the wise, and their dark sayings (Proverbs 1:6). We have a vast number of modern tools to help us dig into the word, but one can do very nicely with just a pickax (Concordance), a shovel (Pen), and a sack (Notebook).
My brother if you could live as long as Methuselah, and spent every day of your life from morning till midnight, in nothing but hearing and learning new things about the power and wisdom of God; Then when you stood before the King, you would have to say "it was a true report that I heard in mine own land of thy acts and of thy wisdom. Howbeit I believe not the words, until I came, and mine eyes had seen it: and behold the half was not told me". (I Kings 10:6-7)
Get in the spiritual river of God's knowledge. At the first it will only be a trickle, but as you go further it will eventually become a great river to swim in. (Ezekiel 47:1-5)
The Bible is like a kaleidoscope. Look at a scripture and behold its precious beauty. Now get that same scripture and shake it or turn it a little bit, and you will see a different picture, but just as beautiful. The combinations and pictures you get are endless.
Go beyond being fed by others and start feeding yourself. There is nothing wrong with being fed by your pastor, bible teachers or some good Christian authors, but you need to create your own spiritual dishes. Yes you will make mistakes in your own Bible study but that is the fun of it. You will never learn anything if you are afraid to even try.
O! Lord open mine eyes that I may behold wondrous things out of thy law (Psalm 119:18), for you reveal the deep and secret things. (Daniel 2:22)