“… failure to distinguish between the cause of a contract and the motivation of the parties has been the source of misunderstandings, … and has complicated the task of categorising the contracts at issue.” 27. In order to identify the key features of a contract, however, we must go beyond an abstract or purely formal analysis. It is necessary to find the contract's economic purpose, that is to say, the precise way in which performance satisfies the interests of the parties. In other words, we must identify the element which the legal traditions of various European countries term the cause of the contract and understand as the economic purpose, calculated to realise the parties' respected interests, lying at the heart of the contract. In the case of a lease, as noted above, this consists in the transfer by one party to another of an exclusive right to enjoy immovable property for an agreed period. 28. It goes without saying that this purpose is the same for all the parties to the contract and thus determines its content. On the other hand, it has no connection with the subjective reasons which have led each of the parties to enter into the contract, and which obviously are not evident from its terms. I have drawn attention to this point because, in my view, failure to distinguish between the cause of the contract and the motivation of the parties has been the source of misunderstandings, even in the cases under consideration here, and has complicated the task of categorising the contracts at issue. [159] So what is the correct approach in the instant case? There are number of pointers in the authorities referred to in Part 3 of this judgment, under heading (a) “Authorities as to the approach to be adopted in analysing the relevant transaction”
“… failure to distinguish between the cause of a contract and the motivation of the parties has been the source of misunderstandings, … and has complicated the task of categorising the contracts at issue.”