if indeed you have tasted that the Lord is gracious:

 This food of the word is unadulterated (adolos, G97) . That is to say, there is not the slightest admixture of anything evil in it. Adolos ( G97) is an almost technical word to describe corn (American: grain) that is entirely free from chaff or dust or useless or harmful matter. In all human wisdom there is some admixture of what is either useless or harmful; the word of God alone is altogether good. 