The writer felt so bad that he lost his appetite. When we face sickness and despair, our days pass blindly, and we don't care about even our basic needs. In these times, God alone is our comfort and strength. Even when we are too weak to fight, we can lean on him. It is often when we recognize our weaknesses that God's greatest strength becomes available.
Psalms 102:6-7
These birds are pictures of loneliness and desolation. At times we may need to be alone, and solitude may comfort us. But we must be careful not to spurn those who reach out to us. Don't reject help and conversation. Suffering silently is neither Christian nor particularly healthy. Instead, accept graciously the support and help from family and friends.
Psalms 102:16-22
Christ's future reign on earth will encompass two events mentioned in these verses. Jerusalem (Zion) will be restored, and the entire world will worship God (Rev 11:15; Rev_21:1-27).
Psalms 102:25-27
The writer of this psalm felt rejected and tossed aside because of his great troubles (Psa 102:9-10). Problems and heartaches can overwhelm us and cause us to feel that God has rejected us. But God our Creator is eternally with us and will keep all his promises, even though we may feel alone. The world will perish, but God will remain. Heb 1:10-12 quotes these verses to show that Jesus Christ, God's Son, was also present and active at the creation of the world.