Our advantage as human beings lies in our power to speak, to articulate a nebulous world into meaningful words and phrases. G‑d spoke and the world came into being. We speak and bring it into focus.
Our words are the camera that determines reality: According to how we focus, so our world will be. With a small breath of air, we determine whether it is beauty that sprouts from the earth, or monsters growing as large as our imagination.
True, there is a time for all things—even a time to speak in negative terms, to make clear that something is wrong and needs correcting. But there is a caveat to negative words. For if they do not reach their goal, their bitterness still remains.
Speak good words, kind words, words of wisdom, words of encouragement. Like gentle rain upon a dormant field. Eventually, they will coax the seeds beneath the soil to life.
I think the analogy of the camera is perfect. We have the opportunity to view the world with many different lenses. We can look through a negative lens, a positive lens, a lens that sees all our blessings and how we shape our own reality can certainly and will project on others. Just like negativity is contagious, so is optimism and joy. So view the world through the lens of positivity, joy, blessings and thankfulness.