How do we know that God values human life more than all else in this world?
Because unlike the rest of creation, God made human life in his own image, to reflect his own glory.
“Then God said, ‘Let us make man in our image, after our likeness. And let them have dominion over the fish of the sea and over the birds of the heavens and over the livestock and over all the earth and over every creeping thing that creeps on the earth.’ So, God created man in his own image, in the image of God he created him; male and female he created them” (Gn 1:26-27).