1. Many religious beliefs incorporate the idea of preexistence, where the soul is believed to have existed before birth.
许多宗教信仰都包含了前世存在的概念，即相信灵魂在出生之前已经存在。
2. The concept of preexistence is often discussed in philosophical debates about the nature of the soul and its relationship to the body.
关于灵魂的本质和与身体的关系，前世存在的概念常常在哲学辩论中被讨论。