6 He that regardeth  the day, regardeth it unto the Lord; and he that regardeth not the day, to the Lord he doth not regard it. He that eateth, eateth to the Lord, for he giveth God thanks; and he that eateth not, to the Lord he eateth not, and giveth God thanks.
6 Whoever regards one day as special does so to the Lord. Whoever eats meat does so to the Lord, for they give thanks to God; and whoever abstains does so to the Lord and gives thanks to God.
6 The one who observes the day, observes it in honor of the Lord. The one who eats, eats in honor of the Lord, since he gives thanks to God, while the one who abstains, abstains in honor of the Lord and gives thanks to God.
6 What's important in all this is that if you keep a holy day, keep it for God's sake; if you eat meat, eat it to the glory of God and thank God for prime rib; if you're a vegetarian, eat vegetables to the glory of God and thank God for broccoli.
6 He who observes the day, observes it to the Lord; and he who does not observe the day, to the Lord he does not observe it. He who eats, eats to the Lord, for he gives God thanks; and he who does not eat, to the Lord he does not eat, and gives God thanks.
6 Those who worship the Lord on a special day do it to honor him. Those who eat any kind of food do so to honor the Lord, since they give thanks to God before eating. And those who refuse to eat certain foods also want to please the Lord and give thanks to God.
Matthew Henry's Commentary on Romans 14:6
Commentary on Romans 14:1-6
(Read Romans 14:1-6)
Differences of opinion prevailed even among the immediate followers of Christ and their disciples. Nor did St. Paul attempt to end them. Compelled assent to any doctrine, or conformity to outward observances without being convinced, would be hypocritical and of no avail. Attempts for producing absolute oneness of mind among Christians would be useless. Let not Christian fellowship be disturbed with strifes of words. It will be good for us to ask ourselves, when tempted to disdain and blame our brethren; Has not God owned them? and if he has, dare I disown them? Let not the Christian who uses his liberty, despise his weak brother as ignorant and superstitious. Let not the scrupulous believer find fault with his brother, for God accepted him, without regarding the distinctions of meats. We usurp the place of God, when we take upon us thus to judge the thoughts and intentions of others, which are out of our view. The case as to the observance of days was much the same. Those who knew that all these things were done away by Christ's coming, took no notice of the festivals of the Jews. But it is not enough that our consciences consent to what we do; it is necessary that it be certified from the word of God. Take heed of acting against a doubting conscience. We are all apt to make our own views the standard of truth, to deem things certain which to others appear doubtful. Thus Christians often despise or condemn each other, about doubtful matters of no moment. A thankful regard to God, the Author and Giver of all our mercies, sanctifies and sweetens them.