Christ knows his sheep. He knows with a distinguishing eye who are his sheep, and who are not; he knows the sheep under their many infirmities, and the goats under their most plausible disguises. He knows with a favourable eye those that in truth are his own sheep; he takes cognizance of their state, concerns himself for them, has a tender and affectionate regard to them, and is continually mindful of them in the intercession he ever lives to make within the veil; he visits them graciously by his Spirit, and has communion with them; he knows them, that is, he approves and accepts of them.

Commentary from “Matthew Henry’s Commentary of the Whole Bible”