Exodus 16:4 - "The the Lord said to Moses, "Behold, I will rain bread from heaven for you; and the people shall go out and gather a day's portion every day, that I may test them, whether or not they will walk in My instruction."
This is the test of whether we will get up first thing every day and seek fresh "Manna" from heaven. This fresh daily word from heaven will help keep us fresh spiritually. When we stop gathering it every day, we will start to grow stale and often start to deteriorate.
But we need more that this to actually grow spiritually. Growth requires more than what is needed to just sustain us. We need the fresh manna from God, but we also need the meat of the word.
We will not grow unless we are pursuing more and more depth of understanding, and more increase in our vision.
1 Corinthians 2:10 - "But we know about these things because God has sent His Spirit to tell us, and His spirit searches out and shows us all of God's deepest secrets."
What are you doing to pursue more depth of understanding?