Everything in the universe is energy, vibrating & oscillating at different frequencies. Everything is a particle or a wave. Your thought form create your vibrations, where your focus goes is where energy will flow. Focus on what is wrong or bad & you will find yourself on a negative path. Focus on positive thing & what you want to attract into your life you will naturally become more positive.
Crystals serve us as a tool to remind us of what we are wanting to attract to our life. They encourage positivity & positive self talk. Crystal water is another way to constantly remind yourself of your direction & intention.