12 When you come to appear before Me, who has required this from your hand, to trample My courts? 13 Bring no more futile sacrifices; Incense is an abomination to Me. The New Moons, the Sabbaths, and the calling of assemblies— I cannot endure iniquity and the sacred meeting. 14 Your New Moons and your appointed feasts My soul hates; They are a trouble to Me, I am weary of bearing them. 15 When you spread out your hands, I will hide My eyes from you; Even though you make many prayers, I will not hear. Your hands are full of blood. (Isaiah 1:12–15, NKJV)
Acts of worship do not conceal evil hearts and sinful conduct from the eyes of God. God took no pleasure in the many sacrifices Israel offered Him (Isa. 1:10-11). Her heart was far from God; her hands were full of death (Isa. 29:13). Even when Israel offered sacrifices and observed days taught in God’s law, He refused them. This shows contempt for God and for His holy worship. True worship must combine a pure heart of reverent honor for God with the acts of worship God’s word approves. This is worship “in spirit and truth.” This is the worshiper God continues to seek (Jno. 4:23-24).