1Co 2:13 KJV “Which things also we speak, not in the words which man’s wisdom teacheth, but which the Holy Ghost teacheth; comparing spiritual things with spiritual.”
When Abraham was told about the the child they were to have, the bible says that He did not look at the deadness of Sarah’s womb nor did he faint in hope but He believed in hope against all hope. (Romans 4)
There is a way of doing things in the spiritual, things that require faith above all else.
Spiritual things are spoken of with the Wisdom of the Spirit, not with the wisdom of men.
Not based on how men perceive it but how We perceive it through the Spirit. It might be dead physically but like Abraham, compare Spiritual things with Spiritual.
If the word, assurance, etc. came from God we also speak these according to the Holy Ghost not according to man.