These are only a few reasons as I accepted Christ at a young age and He's seen me through so many bad times.
I get peace from knowing that as a Child of God, He will provide for my needs. The Bible tells us in Matthew 6:
Do Not Worry
25"Therefore I tell you, do not worry about your life, what you will eat or drink; or about your body, what you will wear. Is not life more important than food, and the body more important than clothes? 26Look at the birds of the air; they do not sow or reap or store away in barns, and yet your heavenly Father feeds them. Are you not much more valuable than they? 27Who of you by worrying can add a single hour to his life[b]?
28"And why do you worry about clothes? See how the lilies of the field grow. They do not labor or spin. 29Yet I tell you that not even Solomon in all his splendor was dressed like one of these. 30If that is how God clothes the grass of the field, which is here today and tomorrow is thrown into the fire, will he not much more clothe you, O you of little faith? 31So do not worry, saying, 'What shall we eat?' or 'What shall we drink?' or 'What shall we wear?' 32For the pagans run after all these things, and your heavenly Father knows that you need them. 33But seek first his kingdom and his righteousness, and all these things will be given to you as well. 34Therefore do not worry about tomorrow, for tomorrow will worry about itself. Each day has enough trouble of its own.
If you'll read my profile, you'll see how trusting in Him has brought me peace. God never promises an easy life...quite the opposite actually. But He does promise that if we believe, He will see us through it.
To give you an idea, I was given very grim news about my twins during my 21st week of pregnancy. The only thing I could do was rely on God and pray. He showed me that my children would be okay and guess what, they are. They were born healthy babies.
My husband has been to work for 3 weeks now (self employed), only to find something broken just about every day. In addition having to call customers to get payments for work that was done several months ago. The other day, the customer that he was working for told me, "if you guys didn't have bad luck, you wouldn't have any at all." As tough as things are right now, I have peace in knowing that God promises to provide for our needs.
In addition, I try to think about the things that are going right. My mother's neighbor's shop was struck by lightening and burned to the ground a few weeks ago. While I wish that on no one, I can't help but be thankful that A: no one was in the shop. B: the fire didn't spread. C: it didn't hit my mother's home as our entire family including our infants were at my mother's home and actually heard the lightening hit the shop. My family is pretty healthy right now. I have a wonderful husband that despite his struggles, still gets out every day to make a living for his family. I'd been long ready to give up myself if I were in his shoes. There is just so much we have to be thankful for.