The Bible says in 1 Timothy 2:5 that there is only one Mediator between God and man, the man Christ Jesus. In order for him to be our Mediator, he had to become our High Priest, a Priest that knew what it felt like to suffer the temptations of the flesh and Satan, yet without sin. Because he can identify with us, he can represent us before God as our Advocate ( a lawyer or one who pleads the cause or case of another ) based upon the blood he shed at Calvary for the remission of our sins. The bible says we can come boldly unto the throne room of grace and find help in time of need. Hebrews 4:16 )

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1 John 2:1-2   My little children, these things write I unto you, that ye sin not, and if any
man sin, we have an Advocate with the Father, Jesus Christ the righteous.
Vs.2   And he is the propitiation for our sins: and not for ours only, but also for the sins
of the whole world.

1 Timothy 2:5   For there is one God, and one Mediator between God and men, the
man Christ Jesus.

Hebrews 4:15-16   For we have not an High Priest which cannot be touched with the
feeling of our infirmities; But was in all points tempted as we are, yet without sin.
Vs.16   Let us therefore come boldly unto the throne of grace, that we may obtain
mercy, and find grace to help in time of need.

Hebrews 7:25   Wherefore he is able also to save them to the uttermost that come to
God by him, seeing he ever live to make intercession for them.

Hebrews 9:12   Neither by the blood of goats and calves, but by his own blood he
entered in once into the holy place, having obtained eternal redemption for us.

1 John 1:9   If we confess our sins, he is faithful and just to forgive us our sins, and to
cleanse us from all unrighteousness.

* Admitting to God that you have sinned, and asking for forgiveness keeps us in right
  standing with him.