This is because the nature of Judgment is not to display brotherly love. Rather, all is dejection and angry faces. For the nature of Kindness is that of the welcoming right arm, and when love reigns, the creations themselves all behave to one another in a brotherly manner, showing each other smiling faces. But the state of stern judgment is one of hatred and rejection. The faces show anger, and everything is heavy with depression.
We have here two things that are bound up with one another – the plane of the roots (the Sefirot) and that of the creations. For Kindness begets love, and through it the soul radiates with joy, showing a smiling face. Judgment, on the other hand, begets hatred and rejection: the soul is dejected and does not radiate, while the face shows anger. Accordingly, on the plane of the roots, when the Sefirot are levels of stern judgment that push the creatures away without allowing them to become attached to them, those very levels themselves stand in a corresponding state of “dejection”, lacking joy and excitement. However, when they are levels of kindness that bring love to the lower creations, there is a corresponding increase of joy and excitement in those very levels. Moreover, as you have already heard, the Sefirot are the measures of all that exists, and the Supreme Mind calculated the state in which the creations should exist in their time of disrepair, when each is separated from the other through hatred and dejection.