I used to believe that. Use to pray daily for years. But things kept getting worse the more I prayed. So I said what is the use. I only pray for the well being of my children. All else is a crap shoot.
I will pray for you, then. Starting tonight. And you are right that life has no guarentees and it is very frustrating when bad times come. Keep moving your feet, letting go of the past and thinking about what you want in the future.
When my dad lost our mom, he was terribly lost and crushed. He always thought he would be the first to go. He started drinking because she was not there to tell him to stop. Everything came down on his head.
He finally stopped drinking and every day, he tried to think of something he was grateful for. He would thank God for something good visited upon his children or grandchildren if he could not think of something good about his own life that day. Slowly but surely, he lifted out of the dumps, rediscovered himself separate from our mom and began living again.