The verses below from the book of Isaiah make it sound like we are supposed to keep the Sabath and abstain from unclean meats. Can you explain these verses please?
Isa 56:2 Blessed is the man that doeth this, and the son of man that layeth hold on it; that keepeth the sabbath from polluting it, and keepeth his hand from doing any evil.
Isa 56:6 Also the sons of the stranger, that join themselves to the LORD, to serve him, and to love the name of the LORD, to be his servants, every one that keepeth the sabbath from polluting it, and taketh hold of my covenant;
Isa 65:4 Which remain among the graves, and lodge in the monuments, which eat swine’s flesh, and broth of abominable things is in their vessels;
Isa 65:5 Which say, Stand by thyself, come not near to me; for I am holier than thou. These are a smoke in
my nose, a fire that burneth all the day.