Peace comes from within. Do not seek it without. It can be argued that peace and happiness comes from the subjective internalised perspective of realizing things could be worse and being grateful they aren't. The alternative view that peace and happiness comes from the objective external perspective of having more and better things than at present, while important for growth, can be a never-ending source of jealousy, dissatisfaction and disappointment. A balance of the two, where people are grateful for what they have while striving for more seems the best blended perspective.
In order to be happy we must first possess inner contentment; and inner contentment doesn't come from having all we want; but rather from wanting and appreciating being grateful for all we have.
Someone's sitting in the shade today because someone planted a tree a long time ago. The person sitting in the shade now should be grateful for the person who planted and tended that tree. That includes all those benefactors of humanity throughout history that created, invented, financed, produced, maintained and improved all that we enjoy today.
Often people ask how I manage to be happy despite having no arms and no legs. The quick answer is that I have a choice. I can be angry about not having limbs, or I can be thankful that I have a purpose. I chose gratitude.
And I have by me, for my comfort, two strange white flowers - shriveled now, and brown and flat and brittle - to witness that even when mind and strength had gone, gratitude and a mutual tenderness still lived on in the heart of men.
This bread and wine are the simple but eloquent monument to the infinite love of the Son of God, around which we gather with tender, tearful gratitude, because He loved us'so, and because we know that our garlands of affection and consecration are pleasing to Him.