Both Spirit and Soul connect us to what is Eternal and beyond this lifetime.
In my soul and spirit work (which works across all religions), I define Spirit as the universal truths of all life or all humankind. The most important one is love which is also harmlessness and non-violence. In various traditions it is called spiritual love, unconditional love, agape, ahimsa, and metta.
Soul is Eternal but is also unique to each individual. It is expressed in creativity, in being in the right place and time and relationships, and in service.
Spirit calls us to dance our true nature in harmony with All. Spirit work helps us to do that. Soul work helps us to know and revel in our own unique place in the dance.
When we do both, we Dance Life and become Dancers of Life and Life Dances through us. As that happens, we are a unique gift of creativity and healing from the Divine to this world.