If what you have trusted in has moved away from you, if your faith is shaken or has faded, perhaps your beliefs weren't really anchored to Jesus Christ. He is our foundation stone. He is the basis for everything we are, everything we do, and most importantly, the wonderful and glorious future he has for us. Only when we give ourselves to him, fully entrust ourselves to him, do we really begin to be what he made us to be. A false belief may make you feel better for a while, but eventually it will let you down.
Some people place their faith in money, in power, or in their reputation.
Perhaps your faith is in the government, or in a political party. Perhaps it is in science, or a certain social movement. Many fields of human expertise may do much good, but they can never meet the moral and psychological needs of our souls. They cannot save us from our sins or give us eternal life. They are humanly devised religions that will inevitably let us down.