This quote by Charles Wesley speaks to the concept that although humans might pass away, the work of God will continue. It recommends that God is the supreme developer and sustainer of all things, and even when those who are doing His deal with earth might pass away, His plans and functions will still be satisfied. This quote also highlights the idea of the impermanence of human life and the everlasting nature of God's work. It functions as a pointer that our time in the world is restricted, however the effect of our work for God can have a long lasting effect.
"I was married to Margaret Joan Howe in 1940. Although not a scientist herself she has contributed more to my work than anyone else by providing a peaceful and happy home"