Prior to the sacrifice of Jesus no one could be worthy because all had sinned and come short. Jesus was the first one born of woman who did not sin at all so He was the only one who could be the perfectly and sinless sacrifice which was required to reopen the Way to the Tree of Life.True, WITH God all things are possible, and Jesus did everything WITH God, so all became possible through Christ.....There is a reminder to us written in Revelation, where John is brought to tears, as no one in Heaven is found worthy to open the seals........But then it is revealed that Jesus is able, that He is indeed worthy.
If any other human had been or were going to be as worthy as Jesus, there surely would have been at least one other person able to open those seals ?....Wouldn't there ?
Also in the Book of Revelation, chapter 5 we see a sealed book. That Book is the Word of God. People could read the OT which also contained within it God's Truth, but until Jesus came and the Holy Ghost as a result was poured out on "whosoever will" the mysteries contained in that book could not be understood. The message God had sent to man remained in undecipherable types and shadows. Jesus made it possible for anyone to approach and understand God. Who could open the seven seals? Jesus indeed!
Could anyone now do what Jesus did? Someone who could fully surrender to God at all times could. Who can surrender so completely? Alone we cannot even completely surrender, but even in that God will help us:
"Ask, and it shall be given you; seek, and ye shall find; knock, and it shall be opened unto you:
For every one that asketh receiveth; and he that seeketh findeth; and to him that knocketh it shall be opened.
Or what man is there of you, whom if his son ask bread, will he give him a stone?
Or if he ask a fish, will he give him a serpent?
If ye then, being evil, know how to give good gifts unto your children, how much more shall your Father which is in heaven give good things to them that ask him?" Matt 7:7-11