Heb: 11:1: Now faith is the substance of things hoped for, the evidence of things not seen.
God sees and knows things we cannot see and know by the five physical senses. But we can know that what He tells us is true, because He has proven Himself to be true to our flesh through recorded experiences of flesh and blood witnesses in the Bible.
The flesh will automatically think according to the five physical senses plus experience. It’s the Christian’s job to teach their earthly senses to shut up and believe God. Tell it God is truth and appearances are deceiving.
Our doubts and fears are so real because our fleshly senses and experiences are so real. But the Christians must retrain their thinking and reactions to agree with God’s Word even if the flesh cannot see it.
Matt: 14:25-33: And in the fourth watch of the night Jesus went unto them, walking on the sea. 26: And when the disciples saw him walking on the sea, they were troubled, saying, It is a spirit; and they cried out for fear. 27: But straightway Jesus spake unto them, saying, Be of good cheer; it is I; be not afraid. 28: And Peter answered him and said, Lord, if it be thou, bid me come unto thee on the water. 29: And he said, Come. And when Peter was come down out of the ship, he walked on the water, to go to Jesus. 30: But when he saw the wind boisterous, he was afraid; and beginning to sink, he cried, saying, Lord, save me. 31: And immediately Jesus stretched forth his hand, and caught him, and said unto him, O thou of little faith, wherefore didst thou doubt? 32: And when they were come into the ship, the wind ceased. 33: Then they that were in the ship came and worshipped him, saying, Of a truth thou art the Son of God.
Why was Peter afraid there? He knew that Jesus wouldn’t say for him to walk on the water if He wasn’t going to see that he could do it. It was because Peter being a fisherman had seen the wind boisterous many times and it had always meant jeopardy. His senses consequently cried out for safety.
Jesus asked him why he had doubted to get him to realize what went wrong–his faith in God was not as great as his fear of the boisterous wind on the sea.
Christians need to teach and train and train and train their physical senses to be quiet and obey the spirit when faith in the great and precious promises is a better way to handle a matter than backing off or running away. Jesus said:
Mk: 11:22-24: And Jesus answering saith unto them, Have faith in God. 23: For verily I say unto you, That whosoever shall say unto this mountain, Be thou removed, and be thou cast into the sea; and shall not doubt in his heart, but shall believe that those things which he saith shall come to pass; he shall have whatsoever he saith. 24: Therefore I say unto you, What things soever ye desire, when ye pray, believe that ye receive them, and ye shall have them.