That's the big difference between Christianity and other religions. The difference between Works and Grace or Do and Done.
The way you see your life shapes your life.
Unkind people need your kindness the most. They advertise their pain.
God's ultimate goal for your life on earth is not comfort, but character development. He wants you to grow up spiritually and become like Christ.
Your past, present, and future are taken care of as you put your trust in Jesus.
If an organ is somehow severed from its body, it will shrivel and die. It cannot exist on its own, and neither can you. Disconnected and cut off from the lifeblood of a local body, your spiritual life will wither and eventually cease to exist.