Good Tree, Bad Tree, Good Fruit, Bad Fruit

Look at the words of Jesus (below). I'm working backwards in this passage from the previous post, Lord, Lord. First I raised the question, "Does it matter?" Now let's look at the question, "Can we tell?" Jesus says that if we are producing evil...we are evil, but if we are producing good...we are good. We are given the ability to judge based on a person's actions.

Luk 6:43 "For no good tree bears bad fruit, nor again does a bad tree bear good fruit,


Luk 6:44 for each tree is known by its own fruit. For figs are not gathered from thornbushes, nor are grapes picked from a bramble bush.

Luk 6:45 The good person out of the good treasure of his heart produces good, and the evil person out of his evil treasure produces evil, for out of the abundance of the heart his mouth speaks.

Now here's a tough question. Is anyone ever all bad or all good? If not, then are we still able to judge the quality of the man or woman by his or her actions? How do these thoughts feed back into my initial question, "Does it matter how we live our lives?"