Trusting God - and God in people

If I completely trusted God to provide for, and to safeguard, those who are important to me, I would naturally experience little stress.  However, to me, trusting God means trusting God's human agents - including myself.  And the number of people who are, in one way or another, important to anyone paying compassionate attention to world affairs is huge.  So, strive as I may to perceive and fulfill my responsibilities as a father, family member, friend and citizen (let alone as an agent of the Holy Spirit) and trust as I may that others will do so - well, my confidence is not such that I am free of stress.  But it is enough to guide me to peace of mind most of the time.