1 Timothy 4:3-8

who forbid marriage and advocate abstaining from [certain kinds of] foods which God has created to be gratefully shared by those who believe and have [a clear] knowledge of the truth. For everything God has created is good, and nothing is to be rejected if it is received with gratitude; for it is sanctified [set apart, dedicated to God] by means of the word of God and prayer. If you point out these instructions to the brothers and sisters, you will be a good servant of Christ Jesus, constantly nourished [through study] on the words of the faith and of the good [Christian] doctrine which you have closely followed. But have nothing to do with irreverent folklore and silly myths. On the other hand, discipline yourself for the purpose of godliness [keeping yourself spiritually fit]. For physical training is of some value, but godliness (spiritual training) is of value in everything and in every way, since it holds promise for the present life and for the life to come.