Again he measured one thousand and brought me through the waters; the water came up to my knees. Again he measured one thousand and brought me through; the water came up to my waist."
Ezekiel 47:3-4 (NKJV)
There are some well-known sights that people are very familiar with and the places where these famous sights are located are often known for them. For example: Paris, France is known for the Eiffel Tower, California is known for its beaches, and Switzerland is known for the Alps. But while all of these places are known for these things, that is not all that there is to them. Paris has other sights to see besides the Eiffel Tower, California has more than just beaches, and there is more to Switzerland than just the Alps. If all you know about these places are the famous sights, you are missing a lot that these places have to offer.
One wonderful thing with God is that no matter what we have experienced with Him, no matter how much we know about His Word, and no matter how long we have been in our relationship with God there is always more. Some people know about the goodness and love of God, but there is so much more to God than just that. Some people have experienced miracles and mighty moves of God, but there is so much more to God than just that. Some people have spent time reading and studying God's Word and have achieved a level of spiritual development that others do not have, but there is still so much more.
Some Christians have been taught well and are very knowledgeable about the Bible, but there is always more to learn about God and His Word. Some have done great things for God and can't imagine that what has happened in the past can be surpassed in the future, but with God there is always much more. Some believers have only waded into the things of God and then for some reason they believe that they have reached their limit with God. But, we all need to go on to "deeper waters" with God. As Christians we should never get to the point of complacency with God, because there is always so much more that we can experience with God, learn about God and His Word, and do for Him!