The only time we suffer is when we wrestle with a thought that is contrary to "what is". When the mind is perfectly clear, 'what is' is what we accept in this moment. If you want your reality to be different to 'what is' then you might as well try to teach your horse to 'moo'. You can try and try, but in the end your horse will look up at you and neigh. Wanting your reality to be different than what it is in this moment, is just as hopeless. You can spend the rest of your life trying to teach your horse to 'moo'.
And yet if you pay attention, you'll notice that you think thoughts like this all the time. Whenever the word 'should' shows up, that's what is going on, as in "I should be thinner, my friend should be less sensitive, my spouse should be more attentive" you get the idea...
These thoughts are ways of wanting reality to be different than it is. Here is the point - all the stress you feel in your life at this moment is caused by arguing with 'what is'.
People say to me, "But if I simply accept reality then I will become passive and nothing will change. I answer them with this question. Which of these statements makes more sense? "I wish I hadn't lost all that money." or "What can I do now to create more income?"
Accepting 'what is' doesn't mean you settle for the way things are, it just means you give up all the resistance and inner struggle by wishing it were different.
When undesirable things happen, it can be helpful not to let go and not mentally argue with them. We know this, and the only reason we continue doing it is because it is a habitual pattern. You can change your habitual patterns when you work with your core beliefs and subconscious mind.