For one believeth that he may eat all things: another, who is weak, eateth herbs.
[For] (this supplement is superfluous) one believeth that he may eat all things - having learned the lesson taught to Peter (Acts 10:9-16; Acts 10:28).
Another, who is weak, eateth herbs - restricting himself probably to a vegetable diet, for fear of eating what might have been offered to idols, and so would be unclean, (see 1 Corinthians 8:1-13.)