Charles H. Spurgeon on Psalms 104:21

The young lions...seek their meat from God. God feeds not only sheep and lambs, but wolves and lions. It is a strange expression that young lions when they roar after their prey, should be said to seek their meat of God; implying that neither their own strength nor craft could feed them without help from God. The strongest creatures left to themselves cannot help themselves. As they who fear God are fed by a special providence of God, so all creatures are fed and nourished by a general providence. The lion, though he be strong and subtle, yet cannot get his own prey; we think a lion might shift for himself; no, it is the lord that provides for him; the young lions seek their meat of God. Surely, then, the mightiest of men cannot live upon themselves; as it is of God that we receive life and breath, so all things needful for the maintenance of this life. Joseph Caryl.