"The key is in the solution" means that the crucial piece of information or understanding needed to solve a problem is already present within the problem itself, often hidden or requiring careful analysis to uncover; essentially, the answer is already there if you look closely enough.
In the solution":
Indicates that this critical information is not separate from the problem but is part of the details given.
The Bible does not attempt to prove the existence of God but instead assumes it. Instead, the Bible focuses on who God is and how to have a relationship with God.
"Hell is a metaphor" means that the concept of Hell, as described in religious texts, is not meant to be understood as a literal place of torment, but rather a symbolic representation of the ultimate state of separation from God, suffering, and the consequences of evil actions, often using imagery like fire and darkness to convey the severity of this state.