In regular language, "mercy" means being caring and compassionate toward people in poor states. That's a position we are all in relative to the Lord, all the time. Without Him we would be unable to choose what is good; without Him we would be unable to formulate a reasonable thought. Without Him, in fact, we would instantly cease to exist; we have life only because He constantly gives us life. So we are, quite literally, at His mercy. Fortunately, the Lord is caring and compassionate to a degree we cannot fathom. He is the source of all caring and all compassion, and of love itself. His mercy toward us never lessens, never abates, never ends; His whole purpose is to bring each of us, individually, to heaven. The meaning of "mercy" in the Bible is closely tied to this idea: it represents love in a general sense, and the desire for good that comes from love. It can also represent the desire for good and the ideas that describe it when those thoughts and desires are inspired by love of the Lord.

383. "For the Lamb who is in the midst of the throne will shepherd them." (7:17) This symbolically means that the Lord alone will teach them.

The Lamb in the midst of the throne symbolizes the Lord in respect to His Divine humanity in the inmost of heaven and thus in everything connected with it (no. 44). The throne is heaven (no. 14), and the Lamb is the Lord in respect to His Divine humanity (nos. 269, 291). And He who is in the inmost of heaven and thus in everything connected with it is the only one who shepherds all people, that is, who teaches them.

If a question is raised as to how He alone can shepherd all, be it known that it is because He is God, and because He is present in the whole of heaven like the soul in its body; for heaven, arising from Him, is like a single person.

To shepherd means to teach because in the Word the church is called a flock, and the people in the church are called sheep and lambs. Therefore to shepherd means, symbolically, to teach, and the shepherd one who teaches, and this in many places, as for example:

On that day your flocks will graze in a broad meadow. (Isaiah 33:23)

He will feed His flock like a shepherd. (Isaiah 40:11)

They shall graze along the roads, and have their pasture on all the hillsides. (Isaiah 49:9)

(Israel) shall graze on Carmel and Bashan. (Jeremiah 50:19)

...I will seek out My sheep... I will feed them in good pasture, and... in rich pasture on the mountains of Israel. (Ezekiel 34:12-14)

You, Bethlehem Ephrathah, it is a small thing that you are among the thousands of Judah. Out of you shall come forth to Me One who will be Ruler in Israel... He shall stand and graze in the strength of Jehovah... (Micah 5:2, 4)

Feed Your people... Let them graze in Bashan and Gilead... (Micah 7:14)

The remnant of Israel... shall graze and lie down... (Zephaniah 3:13)

Jehovah is my shepherd; I shall not want. He makes me to lie down in pastures of tender grass. (Psalms 23:1-2)

(The Lord) chose David... to shepherd Jacob... and Israel... and he shepherded them... (Psalms 78:70-72)

Jesus said to Peter, "Feed My lambs." And a second and third time He said, "Feed my sheep." (John 21:15-17)