It is important. ( 1 John 1v 7)

 There is an old hymn written by E A.Hoffman , and the first verse goes ,

                                         'Have you been to Jesus for the cleansing power?

                                          Are you washed in the blood of the Lamb?

                                          Are you fully trusting in His grace this hour?

                                          Are you washed in the blood of the Lamb'.

This hymn is rarely song these days,I suppose because it is thought that it would not make sense to modern ears, for whatever reason. The fact is not many preachers explain what being washed in the blood of the Lamb  means.In the OT sacrifice was practiced, blood was shed and the animal was sacrificed on an altar.the blood  was splashed against the altar, (Lev8 v 19)Hebrews 9 v 22 tells us ,the law requires that nearly everything be cleansed with blood, and without  the shedding of blood there is no remission of sins, (or there is no forgiveness).In Isaiah 6 v 5, sin has with it a real sense of uncleanness ,or even defilement, which cuts us off from a holy God.Unless that sin is dealt with,we will remain cut off from God in time and in eternity. Sin cuts us off from a holy God,but Christ death on the cross changed all that,it paid the price to set us free from sin (1 Peter 1 v 18 -19) .It also  cleansed us, or washed us from our sinful defiled state. (Rev 7 v 14  )

                                                     'O Cavalry!  O Cavalry !

                                             Where Jesus shed His blood for me,

                                                     O  Cavalry! O Cavalry!

                                              Twas there my Saviour died for me. (Words William Mc Kendree)