Psalm 104 is a hymn celebrating God's creation and provision for all living things. Verse 21, "The young lions roar after their prey, and seek their food from God," is a particularly evocative image. Here's a breakdown of what it means:

"The young lions roar after their prey..." This paints a vivid picture of young lions, hungry and driven by instinct. Their roar is a sign of their need and their aggressive pursuit of sustenance.

"...and seek their food from God." This is the key to understanding the verse. It doesn't mean the lions are consciously praying. Instead, it highlights the idea that God is the ultimate provider for all creation. Even the lions, who actively hunt and kill, are ultimately dependent on God for their sustenance. God designed the food chain and the natural world in such a way that these lions can get their food.

Here's a broader interpretation of the verse's meaning:

God's Provision: It emphasizes that God is the source of all life and sustenance. He provides for all creatures, from the smallest insect to the largest predator.
Natural Order: The verse acknowledges the natural order of the world, where some creatures are predators and others are prey. It doesn't necessarily endorse or condemn this order, but simply observes it as part of God's creation.
Dependency: It highlights the inherent dependency of all living things on God. Even those who seem powerful and self-sufficient, like lions, rely on God's provision for their survival.
Instinct and Purpose: It connects the natural instincts of creatures (like the lions' hunger and hunting drive) to God's purpose in creation. Their actions are part of the overall system that God has established.

In summary, Psalm 104:21 is a powerful reminder that God is the ultimate source of all life and sustenance, and that all creatures, even predators, are ultimately dependent on His provision. It highlights the beauty and complexity of God's creation and His active role in sustaining it.