Heb 13:9 Do not be led away by diverse and strange teachings, for it is good for the heart to be strengthened by grace, not by foods, which have not benefited those devoted to them.
1 Timothy 4:3-5 who forbid marriage and require abstinence from foods that God created to be received with thanksgiving by those who believe and know the truth. For everything created by God is good, and nothing is to be rejected if it is received with thanksgiving, for it is made holy by the word of God and prayer.
Colossians 2:16-20 Therefore let no one pass judgment on you in questions of food and drink, or with regard to a festival or a new moon or a Sabbath. These are a shadow of the things to come, but the substance belongs to Christ. Let no one disqualify you, insisting on asceticism and worship of angels, going on in detail about visions, puffed up without reason by his sensuous mind, and not holding fast to the Head, from whom the whole body, nourished and knit together through its joints and ligaments, grows with a growth that is from God. If with Christ you died to the elemental spirits of the world, why, as if you were still alive in the world, do you submit to regulations—
‘It is a good thing that the heart be established with grace.’ Now I have a strong suspicion that a great deal of preaching goes over the heads of the hearers, because preachers have not gauged the ignorance of their auditory, and that, howsoever familiar to the ear the key-words of Christian revelation may be, it by no means follows that there is any definite and clear idea attached to these. So I do not think that it will be a waste of time for just a minute or two to try and put, as plainly as I can, what the New Testament means by this familiar and frequently reiterated word ‘grace,’ which, I suspect, is oftener pronounced than it is understood by a great many people.
To begin with, then, the root meaning of that word, which runs all through the New Testament, is simply favour, benignity, kindness, or to put all into a better and simpler form, the active love of God. Now, if we look at the various uses of the expression we find, for instance, that it is contrasted with a number of other things. Sometimes it is set in opposition to sin – sin reigns to righteousness, grace reigns to life. Sometimes it is contrasted with ‘debt,’ and sometimes put in opposition to ‘works,’ as, for instance, by Paul when he says, ‘If it be of works then is it no more grace.’ Sometimes it is opposed to law, as in the same apostle’s words, ‘Ye are not under law, but under grace.’ Now, if we keep these various uses and contrasts in view we just come to this thought, that that active love of God is conditioned, not by any merit on our part – bubbles up from the depths of His own infinite heart, not because of what we are, but because of what He is, transcends all the rigid retributions of law, is not turned away by my sin, but continues to flood the world, simply because it wells up from the infinite and changeless fountain of love in the heart of God.
And then, from this central, deepest meaning of active love manifesting itself irrespective of what we deserve, there comes a second great aspect of the word. The cause gives its name to the effect, and the communicated blessings and gifts which flow to men from the love of God are designated by this great name. (MacLaren)