When thou passest through the waters, I will be with thee; and through the rivers, they shall not overflow thee: when thou walkest through the fire, thou shalt not be burned; neither shall the flame kindle upon thee. -Isaiah 43:2

Some of us can bear witness that we have had the nearest approaches of God to our souls in times of intolerable pain, and even in seasons of intense depression of spirit as to earthly things. “I was brought low, and the Lord helped me,” said David; and we can say the same. The Lord has said, “When thou passest through the waters, I will be with thee”; as much as to say, “If I am not with thee anywhere else, I will be with thee then.” In the furnace one like unto the Son of God was seen. If Shadrach, Meshach, and Abed-nego never had that glorious fourth person in their company before, they had Him when they were cast into the midst of the glowing coals. Jehovah-shammah makes a seven-times-heated furnace a pleasant arbour. We may say of the refining fire, and of the threshing-floor, and of the oil-press, God has been there. In the time of trouble He has been a very present help. One might almost say, “Send me back to my prison again,” as one did say who lost God’s presence after he had gained his liberty. One might well cry, “Ah! let me have back my pain if I may again overflow with the joy of the Lord’s presence.”… The few so simple and so poor have God with them, and it is enough. ~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/2182.cfm