Wilson's Dictionary of Bible Types
Exodus 30:1 (c) A figure of the sweet, fragrant life of the Lord JESUS offered up to GOD during His life of suffering and death of agony wherein and wherewith GOD was well pleased.
Exodus 30:9 (c) In this case, the strange incense is a figure of human activities and religious performances which are offered to GOD for His acceptance in competition with and instead of the life of the Lord JESUS. It is human merit substituted for CHRIST's merit.
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Watson, Walter. Entry for 'Incense'. Wilson's Dictoinary of Bible Types. https://www.studylight.org/dictionaries/eng/wdt/i/incense.html. 1957.