Tao is the source of both fullness and emptiness. But it is itself neither fullness nor emptiness.
ZhuangziThere is a saying that Heaven is internal, humanity external and Virtue comes from the Heavenly. Know Heaven and humanity's actions, root yourself in Heaven and follow Virture.Then you can bend, stretch, rush forward or hold back, because you will always return to the core and it will be said you have achieved the supreme.
ZhuangziThe mind remains undetermined in the great Void. Here the highest knowledge is unbounded. That which gives things their thusness cannot be delimited by things. So when we speak of 'limits', we remain confined to limited things. The limit of the unlimited is called 'fullness.' The limitlessness of the limited is called 'emptiness.' Tao is the source of both. But it is itself neither fullness nor emptiness
Zhuangzi