What is trust?

Psalm 84:12
...Blessed is the man who trusts in you.

What is total and complete trust? Is it never doubting? Never worrying? Always praising? Forever thanking? Peace? Patience? Contentment? Lack of pride & selfishness?

Giving of love, time and resources? To what extent? Where does trust vs. personal responsibility join? Or, is it all about trust? To take care of what you've (The Lord) provided & always know it's yours - not to worry or doubt when you take it away or ask that we give it to others.