Understanding some of life's hard lessons opens us up to greater achievements and can help us overcome the obstacles that hold us back.

Here 15 “difficult truths” that can improve your life (taken from responses to a Redditor named Rare_Can_5418.)

1. Stop comparing yourself "Comparison is the thief of joy."

2. Some people won't like you "You can be the sweetest, juiciest peach on the tree. But some people don't like peaches."

3. Things are just things "They don’t have feelings. They don’t care if you give them away or sell them or throw them out. If a thing is useful, keep it. If not, get rid of it."

4. Not all friendships last "Surprisingly though, the ones that last are not necessarily the best (or even good) ones."

5. You may be the bad guy "You can do your best with someone and still be the villain in their story."

6. You can't change people "You can only help people who actually want it. If they’re not ready to change or put in the effort, there’s not much you can do."

7. How we judge "We judge ourselves by our intentions. We judge others by their actions."

8. Depending on people "Once you're an adult, there really isn't anyone you can 100% depend on except yourself. There will still be people in your life to lean on, but everyone has their limits in how they can help you."

9. Nice doesn't equal good "Nice people aren't always good people."

10. Everything is temporary "You can suddenly lose anything and anyone at any time...and maybe all at once or in quick succession without so much as a warning."

11. Nobody is thinking about you "In general, people in the real world are oblivious to you. You're not even a blip on their radar. If you're insecure about something you wear or how you look, remember: nobody cares."

12. No one is coming to save you "Once you internalize this and do it, your self-esteem will be through the roof."

13. Nobody knows what they're doing "...nobody knows what they’re actually doing and life is actually a big joke."

14. Love is reciprocal "If a romantic interest is not giving you the same attention/respect you give them, they don't really care about or want you."

15. Who's good for you? "People who are good for you will make you feel happy, joyful, accepted, cared for, and filled with fun times, despite any differences. People who are not good for you will make you feel anxious, sad, down, slighted, judged, and never check in on you if you're not okay, and won't even bother noticing when you're not okay."