“Things which cost nothing are those which cost the most. Why? Because they cost us the effort of understanding that they are free.”

“The fundamental idea of transaction costs is that they consist of the cost of arranging a contract ex ante and monitoring and enforcing it ex post, as opposed to production costs, which are the costs of executing a contract.”

“Why not? Everything you've got to own costs money. Everything you do costs money. You can't take your wife on a date for free.”

“Love costs all we are
and will ever be.
Yet it is only love
which sets us free.
A Brave and Startling Truth.”

“Every free thing has an invisible cost attached to it.”

“System costs can be considered in many different ways. For example, the cost for making the system and the cost for operating it may be used as a basic for judging the total cost. The total cost may also be arrived at in another fashion, as, for example, the sum of the fixed cost, variable cost, past investment and other charges. Furthermore, in many cases where systems engineering is required several time phases are involved for which the cost factors may be significant, such as the study phase, the breadboard phase, the prototype phase, and the production phase.”

“Grace is free only because the giver himself has borne the cost.”

“The stars are a free show; it don’t cost anything to use your eyes”

“Hope costs nothing.”

“3660. Nothing costs so much as what is given us.”