Mindfulness is a faculty that can be developed without any limitations, by itself.

However, effort and concentration have got to be developed together, in harmony and balance. If there is insufficient effort, there will be no concentration. Similarly if there is too much effort also there will be no concentration. They must always be in balance.

Similarly, wisdom and faith must also be balanced and developed together. If you try to acquire wisdom without any faith, it will not lead to wisdom, it will only lead to intellectualism. That will not take you to your goal. similarly, faith alone is not good enough, that will fall to blind faith. And there is no place for blind faith in the Buddha's teaching. It must always be accompanied with wisdom. Wisdom is the quality on which faith gets strengthened. Therefore wisdom and faith too must go hand in hand;