/Has each soul a special mission?/
Your soul has a special mission. Your soul is supremely conscious of it.
Maya, illusion or forgetfulness, makes you feel that you are finite, weak and helpless. This is not true. You are not the body. You are not the senses. You are not the mind. These are all limited. You are the soul, which is unlimited. Your soul is infinitely powerful. Your soul defies all time and space.
Has your soul a special mission? Yes. Your mission is in the inmost recesses of your heart, and you have to find and fulfill it there. There can be no external way for you to fulfill your mission. The deer grows musk in his own body. He smells it and becomes enchanted, and tries to locate its source. He runs and runs, but he cannot find the source. In his endless search, he loses all his energy and finally he dies. But the source he was so desperately searching for was within himself. How could he find it elsewhere?
Such is the case with you. Your special mission-which is the fulfillment of your divinity - is not outside you, but within you. Search within. Meditate within. You will discover your mission.
/When we see through the Light of the soul, is it always with the feeling of joy?/
Yes. It is always with a feeling of inner joy and this joy may often be expressed by the shedding of tears. This shedding of tears is the outer expression of the soul's delight and has nothing to do with human sorrow, grief or frustration. It is like a mother shedding tears when she sees her son returning home from abroad. Her tears are the expression of her inner joy.