I have few questions and need your honest answer.

Question# What is the most important Gift God has given you to acknowledge God existence.

Note: My options are below: you can add yours if not listed, but please do give a good reasons.

Options:
Life

Earth

Brain

His only Son (Jesus Christ)
Prophet Muhammad (PBUH)

My own answer:
(Brain) God as use me as my own physical example to acknowledge God existence and to believe in God, because with my brain God has given me the freewill to acknowledge God existence and decide if i want to believe in God or not yet he still loves me and give me the power to record information and be imaginative with the most powerful tool nothing on earth can replace. the (Brain) this is the best gift and only love God has given me. IF there is paradise only my Brain can get me there.

1)His word(the bible) we have not only believed but have tasted it and found that is true.
2) The holy spirit: it bears witness that God really exist.

chivic:
1)His word(the bible) we have not only believed but have tasted it and found that is true.
2) The holy spirit: it bears witness that God really exist.

How did you digest all this information have eyes to see, ear to hear it and mouth to speak it? how do you come about answering my question what did you use?