Something I've found to be the truth is that input=output. In mathematical terms 0=0, 1=1, 2=2.
Whatever you put in is what you'll receive on the other end. It's OK if you don't get the desired output immediately. It will definitely come to you someday in a language, not so foreign anymore. In my book of life, the turtle always catches up with the rabbit.
If you put on a sad face, all you'll receive is worry from others. If your smile is true and the delivery of your message is pure, admiration awaits you.
In hindsight, input=output is not rocket science, but it sure took me some time to be aware of it.
Don't aim for the moon, know your weaknesses, and you might reach farther. Peace and Love belong to the ones that understand not the one that knows.