Determination and persistence are melded together. Their basis comes from people who stay hungry and don`t allow themselves to get too comfortable. Entering a comfort zone is the fastest way to kill your drive and determination, at which point you begin to accept whatever you have as being "good enough." There is no self-esteem in accepting the status quo. There are tremendous emotional and psychological rewards that come with pushing yourself to break through past limits and, in the process, creating something of value for yourself and others.