A quote from Mahatma Ghandi:

Always aim at complete harmony of thought and word and deed. Always aim at purifying your thoughts and everything will be well.

It is a natural process that our deeds proceed forth from our actions. We never make actions that have not first passed through our mind or brain, even if only for a breif second. If we think about wanting more money, speak about wanting more money, and eventually obtain more money, we have not necessarily accomplished anything great.

This is where the aim to purify the thoughts is essential.