If you don’t think Jesus Christ made a tremendously difficult sacrifice, then I don’t think you realize the depth of what took place.
Much more was occurring on the cross that His physical suffering, which was horrendous. I don’t think you or I can imagine it or the weight of carrying the sins of the world; every sin of every person that has ever lived or ever will. As bad as the physical suffering, I don’t think it compares to the separation Jesus endured as His Father turned His back on His beloved Son who bore the sins of the world. As well the grief the Father endured turning from His Son.
If we now consider the nature of time and eternity (see Arthur C. Custance, Journey out of Time, Ref. 2) it must surely become clear that what was (for us) three hours' suffering by Jesus in total estrangement from the Father---was for Jesus an event in eternity which never ends. The work of Jesus on the cross, as far as we are concerned, is completely finished. Jesus is not now hanging on a cross. He has been raised from the dead, and sits in heaven, fully in charge of the universe as a resurrected man. One man, one son of Adam, Jesus the Lord is now living in glory and He is in charge of the universe.
But in another sense, if we could step into eternity and view an eternal being such as the Son of God experiencing life---if we could see things from the vantage point of eternity---then we would perceive that a part of the eternal God must suffer forever, outside of time, because of human sin.