When we talk about whether or not a person is ethically right, we can look at the actions that he or she may partake in. These actions maybe studied in different situations such as the one that we were told to evaluate. While leaving the grocery store, one witnesses an old man struggling with his oxygen tank. Without thinking, you lift the tank and help the elderly man. This action is a kind gesture, but would we consider this a moral act? One could analyze this situation with two different ethical theories, by Kantian and/or Aristotelian views.
The approach that we take with Kant's views is strictly based on reason. The key factor in this situation with Kant would ask if we did this action without any thought. Because Kant heavily argues that a moral person has to be rational, the thought process that you went through to arrive to the action is needed and very important. With this in mind we need to look at the other key concepts of his theory. With every action we take, we need to consider whether or not we are willing to say that it could be turned into a universal law. This law would then have to apply to everyone and there would be no exceptions. He believes that we should not lie in any circumstance. We need to maintain the no exception policy because it helps with the consistency of this theory. Most of Kant's beliefs are also based on duties to one another, ourselves, etc. We have a strict duty to benefit towards other people. We should strive to promote their welfare or as he says, "respect their rationality."
He might ask, "What was your intention when you decided to do this?" In this situation there was no intention. You just acted how you would normally if a situation like this occurred. It took no thought at all ...