But in their context, the words 'Choose this day who you will serve.' were spoken to God's chosen people of Old Testament times, not to sinners in general, and 'Open the door and I will come in and sup with you.' is a paraphrase of this verse, spoken to a church, the church of the Laodiceans:
““Behold, I stand at the door and knock. If anyone hears My voice and opens the door, I will come in to him and dine with him, and he with Me.” (Re 3:20 NKJV)
Again, not an invitation to sinners to open the door of their hearts to Jesus.