Numbers 28 summarises the offerings required of Israel under the law; the various daily offerings, the offerings specifically for the Sabbath, the monthly offerings, the special offerings for feasts throughout the year. They were offered time and again, reinforcing to Israel the consequences of their sin.
By contrast, in John 1, we are introduced to “the Lamb of God, who takes away the sin of the world”. John the baptist was a witness to the unique qualities of this lamb, “the true light, which gives light to everyone… for the law was given through Moses; grace and truth came through Jesus Christ”.
Like John, we are called upon to be witnesses of God’s grace and mercy, of His great love in offering us a relationship we could never deserve. In Jesus “was life, and the life was the light of men”, and so we are to be lights shining in darkness, reflecting God’s glory.