***DISCLAIMER***The following is far from an exhaustive post. Instead, it makes a best effort to sufficiently answer the question.
Recently, someone asked me if it is biblical to speak things into existence by faith. This person cited Hebrews 11:1 in asking the question. Below is my response to that question.
It is most definitely unbiblical to say one can speak things into existence by faith.
In fact, the referenced passage (here I cite Hebrews 11:1-5) does not pertain to speaking things into existence (NASB):
Now faith is the assurance of things hoped for, the conviction of things not seen. 2 For by it the men of old gained approval. 3 By faith we understand that the worlds were prepared by the word of God, so that what is seen was not made out of things which are visible. 4 By faith Abel offered to God a better sacrifice than Cain, through which he obtained the testimony that he was righteous, God testifying about his gifts, and through faith, though he is dead, he still speaks. 5 By faith Enoch was taken up so that he would not see death; and he was not found because God took him up; for he obtained the witness that before his being taken up he was pleasing to God. 6 And without faith it is impossible to please Him, for he who comes to God must believe that He is and that He is a rewarder of those who seek Him.
This chapter (often referred to as the “Hall Of Faith” chapter) proceeds onward in discussing other people of the Bible who died in faith (Hebrews 11:13, 37-40). In fact, the author defines faith as “the assurance of things hoped for, the conviction of things not seen” (v. 1). The chapter mentions nothing of speaking things into existence. Furthermore, the concept itself is foreign to biblical Christianity. Instead, it is a concept rooted in the “Word-Faith” movement, a damnable heresy that is also referred to as the Prosperity “gospel.”