Trust to me is essence of life. There are four feelings/emotions without which human existence will become quite dreary I believe. Trust is one of them other three are love, peace and hope.
No matter how bad the world surrounding us gets we should try to keep these four lamps in as good condition as possible. So that no matter how dark the surroundings may get our soul stays illuminated, every darkness will pass, it is inevitable.
When they pass the world will heal itself too, these feelings will help in quickening that healing, without these healing won’t be complete.
A heart without trust is half dead.