Because Jesus suffered being tempted like us, yet without sin, He is declared to be a suitable man to represent us before our God as our High Priest.
Because Jesus was compassed with infirmities, like His people, He can have compassion upon us when we suffer being tempted.
But our suffering is nothing compared to the temptation and suffering of Christ, when He took our sins upon Himself and was punished in our place by God!
Christ was made perfect by that suffering, so that He might lead many sons unto glory.
In Hebrews, the full weight of Christ's suffering for us is finally laid bare in chapter 5. It is presented in sharp contrast with the nobility and honor of Christ to be made our High Priest by God.
That honor was given to Him by His Father from of old. He is declared to be the Father's Son, and by an oath, made a priest forever after the order of Melchisedec.
From the beginning, Christ is the King of Peace, the King of Righteousness, and our faithful High Priest!
But it all comes crashing into the horror, the terror, ignominy, the shame of being judged guilty in our place for our sins.
In His flesh, Christ cries out unto God with strong tears of supplication and prayers, at the prospect of being made a curse for His people.
In the fear of God, Christ prays to His Father, Who is able to save Him from death, and the Father hears Him.
Even though He is eternally the Son, yet He learns obedience by the things He suffered at Calvary.
Christ's cries were most vehement, for the weight of our sins laid upon Him, and the punishment He bore for us.
God His Father did hear Jesus when He cried, and did save Him from death when He raised Him from the dead!