When you actually look at what the Buddha taught, he never separates these two practices [mindfulness and concentration]. They are both parts of a single whole. Every time he explains mindfulness and its place in the path, he makes it clear that the purpose of mindfulness practice is to lead the mind into a state of Right Concentration—to get the mind to settle down and to find a place where it can really feel stable, at home, where it can look at things steadily and see them for what they are.
Thanissaro Bhikkhu, an excerpt from the: The Path of Concentration and Mindfulness