Well, atheists have recently redefined atheism as a lack of belief in gods. The wording keeps atheism from being defined in a provable statement, which makes it ineligible to require proof or evidence, things which many atheists demand from people who believe in God. In other words, if an atheist said "God does not exist'' they can't prove it, because they cannot look for him all over the universe
If atheists have successfully communicated this to those of us who believe in God, perhaps they can reciprocate by no longer defining faith as believing in something for which there is no proof. This definition is not only false for most theists, but Christians especially have pointed to the definition of faith:
Faith is the assured expectation of what is hoped for, the evident demonstration of realities that are not seen.
There are lots of things that people can t see, but accept that they exist, such as gravity and wind. God, a being who would have the power, the wisdom, and the motivation to create, is our Creator, and we can perceive his existence from the things that were made. Science has not come up with another explanation that has all of those things - only insufficient theories. Atheists who are scientists, and who later become theists, are usually convinced by their realization of these things, based on their own research.
Not that all atheists point to science to figure out the reason for, or the nature of, our existence, one can only acknowledge the current definition of atheism. However, an atheist can do good things or not do good things, and they still remain an atheist. At least the theist, specifically the Christian, has a written definition of what is good, and if that person does not do it, they will know that they did bad. However, if that person wants to please God, knowing this can be a strong incentive to correct him or herself, and God s reminders can move that person to take steps so that it did not happen again - that is what Jesus teaching, example, and sacrifice is for, and love for him provides even more incentive to practice what is right.
Admittedly, that doesn t work for everyone, especially for those who disown what they claim to believe by their works. But it is the strongest force for good that we have. Cultural influence, family upbringing, or even societal legalities don t have that power.