Inanimate things and animals have a purpose, but do not have a destiny. Whosoever has the breathe of God in him, has a purpose and a destiny (Genesis 2:7). Therefore, if you only have a purpose but you do not have a destiny, you are like someone who is just living for no reason. When God created everyone, He wanted all to be conformed to the image of His Son, Jesus Christ. This is His eternal purpose for us, He doesn't want anyone to die in sin.