Everything God created is good ( 1 Timothy 4:4; Genesis 1:31). We can abuse God"s good gifts (e.g, fornication and gluttony), but marriage and food are essentially good, and we should enjoy them with thankfulness to God for giving them. Thankfulness is the only condition connected to their use. This verse is not saying that everything is good for us (poisons, pornography, etc.), only that all God has created is essentially good ( Genesis 1:31). [source][source][source]
When we thank God for His good gifts we remember that they come from Him and consequently we treat them as set apart for our benefit. We recognize that He has sanctified (set apart) them when we pray (give thanks) for them and reflect on the Scriptures that tell us they come from our heavenly Father for our benefit. [1] Paul"s idea was not that through a ritual of Scripture recitation and praying marriages and food become acceptable for God"s people. We learn that God has set apart what He has created for our enjoyment through the Word of God, and we acknowledge that through prayer. [2] The Greek word translated "prayer" in 1 Timothy 4:5 (enteuxis) means "petition" (cf. 1 Timothy 2:1), but in this context it serves as a generic term for prayer and clearly refers to thanksgiving (cf. 1 Timothy 4:4). [3] Alternatively with his reference to the Word of God Paul may have been thinking of biblical expressions that the early Christians, and the Jews, used when they gave thanks for their food. [4][source]
"Paul"s words certainly sanction the Christian practice of grace before meals. To eat without giving thanks is base ingratitude. But the scope of the passage is much wider than that." [5][source]
To give thanks for a meal or our marriage and then complain about it is inconsistent. [source][source][source]
Advocates of asceticism are still with us today, as Paul wrote they would be. Roman Catholicism, Seventh-Day Adventism, and some cults, to name a few advocates, have promoted this false teaching. [source][source][source]