When something in a person seems to you completely unacceptable or ridiculous – “What! He is like that, he behaves like that, he says things like that, he does things like that” – you should say to yourself, “Well, well, but perhaps I do the same thing without being aware of it. I would do better to look into myself first before criticising him, so as to make sure that I am not doing the very same thing in a slightly different way.” If you have the good sense and intelligence to do this each time you are shocked by another person’s behaviour, you will realise that in life your relations with others are like a mirror which is presented to you so that you can see more easily and clearly the weaknesses you carry within you.
In a general and almost absolute way anything that shocks you in other people is the very thing you carry in yourself in a more or less veiled, more or less hidden form, though perhaps in a slightly different guise which allows you to delude yourself. And what in yourself seems inoffensive enough, becomes monstrous as soon as you see it in others.
Try to experience this; it will greatly help you to change yourselves. At the same time it will bring a sunny tolerance to your relationships with others, the goodwill which comes from understanding, and it will very often put an end to these completely useless quarrels.
Look upon everything with a benevolent smile. Take all the things which irritate you as a lesson for
yourself and your life will be more peaceful and more effective as well, for a great percentage of your energy certainly goes to waste in the irritation you feel when you do not find in others the perfection that you would like to realise in yourself.
You stop short at the perfection that others should realise and you are seldom conscious of the goal you should be pursuing yourself. If you are conscious of it, well then, begin with the work which is given to you, that is to say, realise what you have to do and do not concern yourself with what others do, because, after all, it is not your business. And the best way to the true attitude is simply to say, “All those around me, all the circumstances of my life, all the people near me, are a mirror held up to me by the Divine Consciousness to show me the progress I must make. Everything that shocks me in others means a work I have to do in myself.”
And perhaps if one carried true perfection in oneself, one would discover it more often in others.
Ref : On Thoughts and Aphorisms