This quote by Isaac Bashevis Singer is a tip to us that life is a journey that is eventually out of our control. We might prepare and pursue particular outcomes, but eventually, it is God who is in control of our lives. We ought to accept that life is a novel written by God and trust that He will lead us in the right instructions. We must not be too concerned with the result, however instead focus on living our lives to the max and relying on that God will take care of the rest. We need to be content with the understanding that God is the author of our lives which He will compose a gorgeous story for us.
"Life is life - whether in a cat, or dog or man. There is no difference there between a cat or a man. The idea of difference is a human conception for man's own advantage"