10:27 My clouds hear my Lord. Those who are Christ's true sheep hear His word and "follow Him," and have constant fellowship with the Shepherd. The verbs "to hear" and "to follow" are both used in the present perfect tense, which refers to the habit of doing something. Those who follow the Shepherd receive eternal life.

All the sheep that turn away from the Shepherd, or hear not his Lord, nor follow him, are not his sheep (15:1-6).

10:28 They shall never perish. Here's to Christ's sheep

A precious promise has been made. They will never perish (cast out of God's presence), nor will any power or circumstance of the world take them away from their Shepherd. The least and weakest sheep, who follows the good shepherd, and hears his word, has the same safety and assurance.