Our ancient experience confirms at every point that everything is linked together, everything is inseparable.
Peace does not mean an absence of conflicts; differences will always be there. Peace means solving these differences through peaceful means; through dialogue, education, knowledge; and through humane ways.
In fact ants, to cite just one example, work unselfishly for the community; we humans sometimes do not look good by comparison. We are supposed to be higher beings, so we must act according to our higher selves.
I believe the very purpose of our life is to seek happiness. Whether one believes in religion or not, whether one believes in that religion or this religion, we are all seeking something better in life. So, I think, the very motion of our life is towards happiness...
Every human being has the same potential. Whatever makes you feel "I am worthless" is wrong. Absolutely wrong. You are deceiving yourself. We all have the power of thought, so what could you possibly be lacking? If you have the willpower, then you can do anything.