Concept:
The tree is very strong because its roots are deep; when the water comes and tries to wash or uproot it, it still stands. Our strength is like a tree, it shows over our weaknesses (represented by water). Yet, through our weaknesses, we learn to rely more on God, who is the Provider of our strength, like how a tree grows when it absorbs the moisture. The red crosses represent Christ-likeness, and at the same time, is a symbol (+) that represents strength.
Software:
Photoshop CS3
God Bless