The sinful nature wants to do evil, which is just the opposite of what the Spirit wants. And the Spirit gives us desires that are the opposite of what the sinful nature desires. These two forces are constantly fighting each other, so you are not free to carry out your good intentions.
Jesus told her, “I am the resurrection and the life. Anyone who believes in me will live, even after dying. Everyone who lives in me and believes in me will never ever die. Do you believe this, Martha?”