New Defender's Study Bible Notes
15:1 ought. This is a strong verb, meaning “have an obligation.”
15:3 as it is written. This phrase is from Psalm 69:9, the same verse which the disciples applied to Christ when He purged the temple of the money-changers (John 2:17). He suffered reproach on our behalf; we should be willing to be reproached for His sake (I Peter 4:14).