The real need for depth is not mainly in terms of higher complexity of truth. The real need for most people is greater depth of penetration of the simple truths into hearts and lives.

so when u find yourselves stuck at some "simple ideas" or "familiar passages of the Bible", get off of the theoretical and down to the practical. So ask, "Why don’t we always apply this simple truth?" In other words, "What are the elements of our circumstances, priorities, etc. that keep us from obeying what God so clearly teaches us."