In 1963 I introduced this hymn to some of the saints in the United States. One day, after we had sung this hymn, a dear saint came to me and said, "I can't understand this hymn. Breathing, breathing, breathing—breathing what?" He was somewhat bothered. A few years later, after we had published our hymnal, this same saint said to me, "Brother, my favorite hymn in the hymnal is that hymn on breathing the Lord."
How do we breathe the Lord? We breathe the Lord by opening ourselves to the Lord and calling upon His name. We need to call out to Him and even cry to Him, for, as Jeremiah has told us, calling on the Lord is to cry out to Him. He did this out of the low dungeon. Whenever we are low, that is, down in a "dungeon," we have to call on the Lord by crying out to Him that we may be released from confinement and receive more of the Lord into us.
Isaiah also tells us that our calling on the Lord is our crying to Him. "Behold, God is my salvation; I will trust and not be afraid: for the Lord Jehovah is my strength and my song; he also is become my salvation. Therefore with joy shall ye draw water out of the wells of salvation. And in that day shall ye say, Praise the Lord, call upon his name...Sing unto the Lord...Cry out and shout, thou inhabitant of Zion: for great is the Holy One of Israel in the midst of thee" (Isa. 12:2-6). In these verses Isaiah tells us to praise, sing, cry out, and shout. All of these match the calling mentioned in verse 4. In verse 2 he says that God is our salvation and our strength. God is everything to us. We simply need to draw water out of the wells of God's salvation. How can we with joy draw water out of the wells of salvation? The way is to call on His name, to praise the Lord, to sing a hymn, and to cry out and shout. In verse 4 we find that praising and calling are put together, and in verse 6 we find that crying and shouting are put together. This proves that to call on the Lord is to cry and shout to Him. Many Christians have never shouted. If you have never shouted before the Lord, I doubt that you could have enjoyed the Lord in a rich way. Try shouting before Him. If you have never shouted about what the Lord is to you, I encourage you to try it. The more you shout, "O Lord Jesus, You are so good to me," the more you will be released from your self and be filled with the Lord. You will be in the third heaven. Thus, Isaiah, even in Old Testament times, told people to praise the Lord, call upon His name, cry out and shout.