expand_less Wim is the color of willpower and metal.  It represents the totality of your desires and urges, as well as the discipline to see them through.  Motivation, courage, and determination can be powerful forces in the right hands, and together they can help stave off temptation.
With Dau, Wim represents the fighter, guardian, soldier, and warrior.  But also the threat of attack and the courage to rise to the occasion.  Fear is the dominant emotion of these colors.
With Yun, Wim controls the axis of power and aspects of the physical form or body.  Many extraordinary abilities and powers are based in these colors, as Wim asserts itself as the source of all power and Yun emerges as the effect of that power.
With Pfi, Wim assumes the aspects of war and peace.  Where discipline and morale might fail, a brilliant strategy can succeed.
Sace and Vei are the colors most indifferent to Wim.  Magic subverts power and the nature upon which it depends.  A man can use willpower to resist its effects, but ultimately he is powerless to control it unless he also possesses the wisdom or charisma to do so.