If everything were predestined and immutable as some non-Buddhists believe, what would be the point of undertaking spiritual practice? Since everything has already been set, there is no point trying to change anything in life—if you are having a good life, rejoice in your good fortune; if you are having a miserable one, just bear it. By the same token, if everything were predetermined, it would be useless to give food to the needy since going hungry would have been their destiny anyway. Hence, fatalism fails to stand up to scrutiny.
[Excerpt from Luminous Wisdom Book Series ~ The Right View : On Cause and Effect]