“See to it, brothers, that none of you has a sinful, unbelieving heart that turns away from the living God. But encourage one another daily, as long as it is called Today, so that none of you may be hardened by sin’s deceitfulness.” (Hebrews 3:12-13,NIV)
Jesus, the Son of God intercedes for believers. No need to intercede for those who do not sin.
“Therefore [Jesus] is able to save completely those who come to God through Him, because He always lives to intercede for them.” (Hebrews 7:25)
Jesus made one sacrifice for all sin.
“By one sacrifice He has made perfect forever those who are being made holy.” (Hebrews 10:14)
“If we deliberately keep on sinning, after we have received knowledge of the truth, no sacrifice for sins is left, but only a fearful expectation of judgment and of raging fire that will consume the enemies of God.” (Hebrews 10:26-27)
“Let us throw off everything that hinders and the sin that so easily entangles, and let us run with perseverance the race marked out for us.” (Hebrews 12:1)
“In your struggle against sin, you have not yet resisted to the point of shedding your blood.” (Hebrews 12:4)
Obviously, Christians are called not to sin; but we do. And thank God, Jesus’ sacrifice nails those sins to the cross and His shed blood washes them away. The Holy Spirit says, “Their sins and lawless acts I will remember no more.” (Hebrews 10:17)