The human mind has trouble grasping the magnitude of God, so David explores a word picture that uses a part of the human body. Imagine hands big enough to shape planets (v 3) and you are on the way to understanding how big God is. How can such enormous fingers tend to tiny human beings (v 4)? Why would such a huge mind want to think about us anyway?
The extraordinary answer is not only that God does care about us, but that he has given us a place in creation just below himself (vs 4–6). It is no accident that Jesus refers to himself as ‘Son of Man’ (Matthew 9:6) – he is the ultimate human, and this psalm is used to refer to Jesus both by Paul (1 Corinthians 15:27) and in Hebrews 2:6–8. But we have not been given this senior position so we can become arrogant about it – it is God’s job to receive worship, not ours (vs 1,9). Our high calling brings with it a heavy responsibility: taking care of the planet (vs 6–8).