Absolutely yes. Our thoughts are energy, and energy becomes matter. In fact, energy and matter are two phases of one reality, like ice, water and steam--identical essentially with only a difference in form.
The clearer and purer our thoughts, the better and faster results we see in manifesting our ideas in the world.
We experience this every day in life--if we send out thoughts of fear, scary things happen. If we expect the best from people, that is what we get.
The only way we can change the world is not by trying to change others, but by raising the vibration of our own thoughts and changing ourselves. The whole world resonates to the power of thought.