Jupiter means big and it is expansive and it likes to grows. Neptune is imagination and inspiration. Natal Jupiter inconjunct Neptune means that the persona has the vision and resources to grow and expand.
Sun is you, it is how your present yourself in the light of day. South node is your past and you feel stuck with it. Natal Sun conjunct South node means that you are born near the eclipse and there is a polarity between leaving behind your past life and pursuing your life path.
Transiting planets activate your potentials through situations you experience and new people you meet. Neptune means your hopes, ideals and dream. The north node is your path that you should take in this lifetime. Transiting Neptune conjunct North Node means the situation and people around you wants you to follow your ideal path.