According to Psalm 1:3, Christians are compared to a tree. "And he shall be like a tree planted by the rivers of water, that bring forth his fruit in his season; his leaf also shall not wither; and whatsoever he does shall prosper."
The psalmist illustrates in Psalm 1 that a Christian should have the qualities of a strong, healthy, fruitful tree. Like a tree, a Christian should soak up water and bear luscious fruit. A Christian should be planted by the rivers of water so that his roots might be nourished and his faith firmly rooted. When that happens, the Christian is not affected by droughts for he will have a never ending supply of nourishment and refreshment. His roots are firmly planted in the ground and he is not easily uprooted. He grows and produces a harvest in due season. (Galatians 6:9)
The Christian's leaf shall not wither because his faith is not transitory or temporary. His faith flourishes at all times. In other words, his spiritual life is not subject to seasonal changes. There should be so many branches that others are encouraged and edified by his growth. Finally, when the Christian is planted and rooted, his growth is rapid and he produces so much fruit that whatsoever he does shall prosper.
When firmly planted, the Christian will be able to endure storms. Strong winds might cause him to bend; sometimes almost to the ground, but he will not break. How is he able to stand tall in the midst of storms? Because, like a tree, his unseen roots are firmly planted below the surface.
Jeremiah, like the psalmist, says the same thing. "He will be like a tree planted by the water, that sends out its roots by the stream. It does not fear when heat comes; its leaves are always green. It has no worries in a year of drought and never fails to bear fruit." (Jeremiah 17:8)