You may express your 'good day' in your arrangement or an angry mood. If you feel strongly about the arrangement you are making, try to communicate what you feel to others. To do this you must be able to control the design elements and principles. Proportion - Elongated things seem more graceful, elegant and fragile than thick, short masses. Small things suggest refinement, large things reflect strength and dominance.
Sparse materials speak of restraint, large amounts hint at abundance and exuberance.
For example, an Easter theme is best with symmetrical balance to express the solemnity and dignity of the occasion. A March wind theme is best asymmetrical to suggest the dynamic nature of the wind. Rhythm - Rhythm is movement, thus it sets the speed as well as the direction and kind of activity expressed in the flower arrangement. Transition, variation, contrast - each may be important in expressing certain themes. Most expressive arrangements must have dominance well developed.