To understand the theory's basic ideas, it is instructive to follow Einstein's thinking between 1907 and 1915, from his simple thought experiment involving an observer in free fall to his fully geometric theory of gravity.
Untuk memahami ide-ide dasar teori, maka mengikuti pikiran Einstein antara 1907 dan 1915, dari yang eksperimen pemikiran sederhana yang melibatkan pengamat jatuh bebas ke teori gravitasi geometriknya.