And he/she shall be like a tree planted by the rivers of water,
that brings forth his fruit in his season;
his leaf shall not wither;
and whatsoever he doeth shall prosper
 -Psalms 1:3

 Like a tree, the Christian grows stronger day by day and year by year.

The age of a tree can usually be determined by its annual growth rings.

In dry years they are narrow; in seasons of plentiful rain they are wide.

But the tree always grows some.

Sometimes the growth is rapid,
sometimes slow,
but it is growth.

   The law of a tree is "grow or die."  So it is with the person who delights in the law of the Lord.  This person grows spiritually --in easy times and hard, in prosperity and adversity--sometimes rapidly, at other times slowly; but they grow.

   The child of God is to be like a tree.  The child of God is to be like a tree planted by the rivers of water, always growing.

   "Like a tree planted by the rivers of water," the child of God lives, grows, and bears fruit in the desert of this world.

This is God's promise: