You can make things better, but not the world. You don't have the power to do that. Take your own advice and prove me wrong. Otherwise it's only theoretical.
I've been taking my own advice for years. Thank you, though.
By increasing your own vibration as a result of your spiritual awakening, your thoughts and desires will manifest into the results you wish to see much faster than ever before in your life. With time, this becomes stronger and stronger because your energy has increased; because your vibration within the entirety of the universe has increased. The universe belongs to the energetic. The universe is comprised of energy, vibration and frequencies. Over many years, after putting the power of thought into action, will you manifest all change that you wish to see. This begins with deep, focused concentration on not destroying the old, but crafting the new. After putting new thoughts into habit and by nurturing yourself mentally, emotionally and spiritually over many years, the change might not appear to be palpable, but it will be, albeit in subtle ways to you at first.
Changing the "world" is as simple as one act of kindness to another. The world is made a better place by friendship and love. The power you wield is stronger than you have grown up to believe, because spiritual knowledge isn't taught institutionally - it is only discovered through deep introverted intuition over the course of many years. Knowledge may be handed down to others in various forms, like me writing to you for example, but the only genuine source of knowledge is true experience.
By changing your mind, you are changing your perspectives on life and coincidentally
your world, and effectively,
THE world; again, on subtle levels, but the manifestation of that very energy carries it's vibration along the plane we exist on throughout the entirety of the universe. Everything is connected. Everything is ONE.
The power of love will change the world, but first, that love must come from within you, directed toward yourself. Only then will you have attained such a vibration that will allow you to instill that love, that energy, into your outer worlds. You cannot pour from an empty cup, so to speak. The very thought of "I can't", or "she can't" or "he can't" is a self fulfilling prophecy prohibiting the very change you say cannot happen.