We read from Mark 6 the increasing revelation of the power and authority of Jesus, over the natural and physical elements to the point that there is really no denial that He is who He is, the Son of God, filled with the Holy Spirit of God, having been made man to save the man’s world.
We see a difference between those who believe and those who do not believe in Jesus.
Those who do not believe see nothing.They are blinded by the god of this world.
Those who are open to Jesus and believe what they see, yes, they see wonders beyond any human world. Jesus opens an unseen world for them to have some glimpses: such as getting food supply from the unseen world, not being constrained by the physical and natural laws on earth, and exercising superior authority over unseen forces (wind, sickness).
Mark 6 (in parts)
Those who choose not to believe in Jesus are blocked by ridiculous hindrances such as as follows:
3 Is this not the carpenter, the Son of Mary, and brother of James, Joses, Judas, and Simon? And are not His sisters here with us?” So they were offended at Him.
6 And He marveled because of their unbelief. Then He went about the villages in a circuit, teaching.
Jesus does not confine His power and authority to Himself. He passes on to His chosen disciples who will later carry on doing even greater works after Jesus leaves this world. Here is just a bit of the practical training example:
7 And He called the twelve to Himself, and began to send them out two by two, and gave them power over unclean spirits.
12 So they went out and preached that people should repent. 13 And they cast out many demons, and anointed with oil many who were sick, and healed them.
Feeding the Five Thousand
39 Then He commanded them to make them all sit down in groups on the green grass. 40 So they sat down in ranks, in hundreds and in fifties. 41 And when He had taken the five loaves and the two fish, He looked up to heaven, blessed and broke the loaves, and gave them to His disciples to set before them; and the two fish He divided among them all. 42 So they all ate and were filled. 43 And they took up twelve baskets full of fragments and of the fish. 44 Now those who had eaten the loaves were about[f] five thousand men.
Jesus Walks on the Sea
47 Now when evening came, the boat was in the middle of the sea; and He was alone on the land. 48 Then He saw them straining at rowing, for the wind was against them. Now about the fourth watch of the night He came to them, walking on the sea, and would have passed them by. 49 And when they saw Him walking on the sea, they supposed it was a ghost, and cried out; 50 for they all saw Him and were troubled. But immediately He talked with them and said to them, “Be of good cheer! It is I; do not be afraid.” 51 Then He went up into the boat to them, and the wind ceased. And they were greatly amazed in themselves beyond measure, and marveled. 52 For they had not understood about the loaves, because their heart was hardened.
Jesus Heals and makes well whoever who touches Him
56 Wherever He entered, into villages, cities, or the country, they laid the sick in the marketplaces, and begged Him that they might just touch the hem of His garment. And as many as touched Him were made well.