How do we know God cares about true worship?

God demonstrates His concern for true worship in Zechariah 7 by expressing disappointment in Israel's empty rituals. He challenges them on whether their fasting was truly directed toward Him or simply a form of self-glorification. This highlights that God values worship that is sincere and focused on Him, not just outward compliance to religious practices. Throughout Scripture, we see that God looks at the heart, seeking genuine devotion and faith from His people, as indicated in passages like Isaiah 29:13, where God rebukes His people for their empty worship.