This idea of supplement means to richly and lavishly nourish and provide, grow and develop into maturity and completion. The understanding is that the objective is great and therefore it is proper to provide everything that is needed to ensure the end is accomplished.
A father is caring and passionate but not overly emotional, strong but not stubborn, optimistic but not delusional, a fierce protector and advocate for his own family but not unaware and insensitive to the needs of the community around him.
Excerpt taken from Live in Liberty by Daniel Bush
...the true fear at the foundation of the nuclear threat, or the threat of war, or the threat of hunger, or the threat of poverty is the fear of human suffering and eventual human death.