You'll never meet a happy ungrateful person, or an unhappy grateful person because gratitude and happiness go together. Sometimes happiness precedes gratitude but often gratitude precedes happiness. The latter is achieved by realising things could be worse but aren't and so feeling relieved, grateful and happy.
Zig ZiglarA good life is when you assume nothing, do more, smile often, dream big, laugh a lot and realize how blessed you are for what you have.
Zig Ziglar