MASTER comes from his spiritual abode to call the jivas back home.

                No man can come to me, except the Father which hath sent me
                 draw him.

                                                                                                                                              JOHN 6:44

    Our spirit is exactly of the same essence as God's. Having been separated from that ocean of bliss it has become imprisoned in the prison-house of body and mind. Saints also come down from their spiritual abode to take back home such spirits as are prepared for the return journey.
    It is, in fact, God Himself who comes in the garb of man to lead the jivas out of the tentacles of the Negative Powers, after they have served the period of probation. This is the fulfillment of the grand covenant or the great law - Man is to be the teacher of man - teaching the true redemption, and home-going with rejoicing.

               When the dead shall hear the Voice of the Son of God ...
                  they that hear shall live.

                                                                                                                                           JOHN 5:25

                He who sent thee into the world calls thee back. Return ye
                 to thy native home in Sahaj (beyond the three-fold regions,
                 physical, mental, and causal).

One with God, they come into this world under His behest as His plenipotentiaries to administer His law concerned with home-going. This is their noble mission, and gracefully they fulfill His purpose. Shamas-i-Tabrez tells us about himself:

                Little can you imagine what type of birds we  are, and what we keep
                 warbling all the time. We may look to be a beggar, but our actions
                 are more than kingly. We may appear to be poor, but we are richer
                 than the richest mine. When we are king of kings we care not for the
                 brief stay in this prison-house of the world. We are just a pilgrim here,
                 and cannot remain for long. We hold a covenant with the Lord and
                 stand true to our troth. So long as we are in physical raiment we do not
                 get annoyed with anybody nor do we vex another. Like a veritable
                 paradise we are ever filled with kindly light and heavenly grace.
                 Happily do we live with a cheery heart and a smile on our lips.

Guru Gobind Singh likewise tells us of himself:

                Casting off the duality, I had become one with the Lord. Never did I
                 like to come down again into the world, but it was at His bidding
                 that I had to yield, and I came to fulfill  His purpose.

Kabir Sahib also says:

                Kabir comes from the celestial abode of the Lord and holds a direct
                 commission (instrument of instruction) from Him.

Again, in the Gospel, we have:

                I do nothing of myself; but as my Father hath taught me,
                 I speak these things.

                                                                                                                                      JOHN 8:28

In Gurbani, we also come across similar references:

                O Lalo! I speak nothing from myself. I simply utter what the Beloved
                 puts into my mouth.

                Poor Nanak opens his mouth only when he is bidden to do so.