Correcting oneself is correcting the whole world. The sun is simply bright. It does not correct anyone. Because it shines, the whole world is full of light. Transforming yourself is a means of giving light to the whole world.
Our body in Kali yuga is a field of action: As a man sows, so is his reward. Nothing by empty talk is determined: Anyone swallowing poison must die. Brother! Behold the Creator’s justice: As are a man’s actions, so is his recompense.
Let your aims be common, and your hearts of one accord, and all of you be of one mind, so you may live well together.
With all fears dissolved in the peace of the Self and all desire dedicated to Brahmn, controlling the mind and fixing it on Me (God), sit in meditation with Me as your only goal.

