God has revealed it to us: Those who believe in Christ and have received his Spirit (see 1 Corinthians 6:19; 12:13; Galatians 3:2; Ephesians 1:13; Titus 3:5) are different from the rulers of this world (1 Corinthians 2:8). We cannot understand God's deep secrets through worldly wisdom or philosophy. Only God's Spirit can reveal God's thoughts to his people (see 1 John 2:20, 27; compare Matthew 11:25–27). God has kindly given his Spirit to his people so they can know the wonderful things he has freely given them (compare John 16:13–14).